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Lucy Spacecraft’s Surprise Discovery: Dinkinesh Reveals Binary Nature

Lucy spacecraft’s surprise: Dinkinesh, a main-belt asteroid, revealed its binary nature, setting the stage for the mission’s study of Trojan asteroids.

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The Lucy spacecraft, on its way to study the Trojan asteroids in Jupiter’s orbit, recently made an unexpected detour. During a test run past a main-belt asteroid named Dinkinesh, Lucy’s tracking system revealed a surprising revelation. Rather than encountering a single asteroid, Lucy discovered that Dinkinesh is actually a binary system, consisting of one larger asteroid and one smaller moonlet. This unexpected find has provided valuable insights and sets the stage for Lucy’s upcoming mission objectives.


Dinkinesh duo NASA Goddard SwRI Johns Hopkins APL NOAO e1698953221168
When the Lucy spacecraft encountered asteroid Dinkinesh, it found 2 asteroids instead of 1. Lucy captured this image, showing the smaller satellite slightly behind the main asteroid, at 12:55 p.m. EDT (16:55 UTC) on November 1, 2023. At that time, the light travel time between the spacecraft and the asteroid – in the main asteroid belt – was some 30 minutes. The spacecraft and the asteroid were some 300 million miles (500 million km) from Earth. Yet Lucy was so perfectly targeted that it came within a minute of its scheduled closest approach, to pass approximately 270 miles (430 km) above the surface of Dinkinesh. Image via NASA/ Goddard/ SwRI/ Johns Hopkins APL/ NOAO.

Dinkinesh’s Binary Nature Unveiled:
The name Dinkinesh, meaning “marvelous” in Amharic, perfectly encapsulates the astonishment experienced by the Lucy mission team when they realized the true nature of this asteroid. Initial glimpses of Dinkinesh in September indicated its potential binary nature, as its brightness changed over time. This phenomenon resembled the method used by astronomers to identify planets by observing the fluctuation in brightness when they pass in front of stars.

Lucy’s latest images of Dinkinesh confirmed the existence of the binary system. The parent asteroid was estimated to be about 0.5 miles (790 m) wide, while the moonlet measured approximately 0.15 miles (220 m) in size. This successful mini-mission made Dinkinesh and its moon the smallest main-belt asteroids ever to be well-imaged by a spacecraft, marking a significant milestone for scientific exploration.

Lucy’s Next Destination:
After this unexpected encounter with Dinkinesh, Lucy’s trajectory now sets its sights on future objectives. In December 2024, the spacecraft will undergo a second gravity assist from Earth, propelling it toward the orbit of Jupiter. Once there, Lucy will embark on its primary mission of studying the Trojan asteroids. These asteroids have been captured by Jupiter’s gravitational pull and are believed to have coexisted with the gas giant for billions of years within its orbit around the sun.

Alteration of Lucy’s Mission Plan:
Dinkinesh was not originally part of the Lucy mission’s itinerary. The spacecraft’s original plan involved visiting the main-belt asteroid (52246) Donaldjohanson in 2025, followed by a tour of nine Trojan asteroids beginning in 2033. However, the discovery of a conveniently located small asteroid presented an opportunity for Lucy to make an additional visit. Raphael Marschall of the Nice Observatory in France identified Dinkinesh, estimated to be 0.4 miles (700 m) in size. The mission team adjusted Lucy’s course, bringing it closer to the asteroid, and successfully executed the flyby from a mere 270 miles (430 km) away.

Lucy’s Journey So Far:
Launched in October 2021, Lucy underwent its first flyby of Earth a year later. On January 24, 2023, the mission team added Dinkinesh as a new target, deviating from the original plan. Through a strategic maneuver, Lucy managed to observe this fascinating asteroid two years ahead of schedule. It is worth noting that Dinkinesh derives its name from the Ethiopian term for the famous human ancestor fossil known as Lucy, after which the spacecraft’s mission is named.

Significance of the Tracking System:
Lucy’s encounter with Dinkinesh served as an excellent test for the spacecraft’s innovative tracking system. This system was developed to overcome the longstanding challenge of accurately determining the spacecraft’s distance from an asteroid and precisely pointing the cameras. By approaching Dinkinesh at a similar angle relative to the sun as it will during the Trojan asteroid encounters, scientists were able to practice under comparable conditions well in advance of the main mission.


Lucy NASA Asteroid flyby art sq
Artist’s concept of the Lucy spacecraft making a close flyby of an asteroid. Image via NASA.

The Lucy spacecraft’s unexpected discovery of Dinkinesh’s binary nature during its test run past the main-belt asteroid has provided valuable insights into the diversity of celestial bodies within our solar system. This surprise encounter showcases the capabilities of Lucy’s tracking system and its ability to adapt to unforeseen opportunities. As Lucy continues its journey, it promises to unravel more mysteries surrounding the Trojan asteroids and contribute to our understanding of the fascinating celestial objects that reside within Jupiter’s orbit.

Source: NASA

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Check out this article from Earthsky https://earthsky.org/space/lucy-spacecraft-to-visit-asteroid-nov-1-2023/?mc_cid=c07b5b936a&mc_eid=36fb49e54a

The science section of our news blog STM Daily News provides readers with captivating and up-to-date information on the latest scientific discoveries, breakthroughs, and innovations across various fields. We offer engaging and accessible content, ensuring that readers with different levels of scientific knowledge can stay informed. Whether it’s exploring advancements in medicine, astronomy, technology, or environmental sciences, our science section strives to shed light on the intriguing world of scientific exploration and its profound impact on our daily lives. From thought-provoking articles to informative interviews with experts in the field, STM Daily News Science offers a harmonious blend of factual reporting, analysis, and exploration, making it a go-to source for science enthusiasts and curious minds alike. https://stmdailynews.com/category/science/

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Gaza ceasefire and hostage deal: Why now and what next?

A Gaza ceasefire and hostage deal is expected to begin January 19, 2025, aiming to end conflict and facilitate reconstruction after months of violence.

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Demonstrators in Tel Aviv call on the Israeli government to secure the release of the hostages during a Jan. 15, 2025, protest. Jack Guez/AFP via Getty Images)

Asher Kaufman, University of Notre Dame

A much-anticipated Gaza ceasefire and hostage deal is set to take effect on Jan. 19, 2025 – subject to an Israeli government vote on the package scheduled for the morning of Jan. 16.

The breakthrough comes 15 months into the bloody conflict sparked by an Oct. 7 2023, attack by Hamas gunmen in which about 1,200 Israelis were killed and 251 hostages taken. In the subsequent bombing and siege of the Gaza Strip, some 45,000 Palestinians have been killed.

But why has the breakthrough happened now, and what does this mean for the long-term prospects of a more permanent peace? The Conversation turned to Asher Kaufman, an expert on Israeli history and professor of peace studies at University of Notre Dame, for answers.

What is the main content of the deal?

Not all the details have been ironed out or released. But what we do know is this:

The deal is divided into three stages. In the first stage, 33 women, children and men who are sick or over the age of 55 will be released in stages over 42 days. The hostages, thought to have been held by Hamas in its network of tunnels under Gaza since Oct. 7, include two American nationals. In total, 94 hostages remain in captivity, including 34 thought to be dead.

The Israeli military will also allow Palestinians forced to leave northern Gaza to return, although much of the area and their homes are in complete ruins.

On the 16th day of implementation, negotiations will begin regarding the next stage of the deal, which will include the release of the remaining hostages taken by Hamas. As part of this stage, Israel will withdraw its forces to a defensive belt that will serve as a buffer between the Gaza Strip and Israel.

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A man in a headscarf holds aloft a red, green and white flag.
Palestinians celebrate the announcement of the hostage deal on Jan. 15, 2025, in Deir al-Balah, Gaza Strip. Ashraf Amra/Anadolu via Getty Images

In exchange for freeing the hostages, Israel will release Palestinian prisoners according to an agreed-upon ratio for each Israeli dead or living civilian or soldier hostage. In the initial wave, hundreds of Palestinian women and children currently held in Israeli prisons will be freed. Also, Israel will allow more humanitarian assistance to flow into Gaza.

The third stage of the deal will include the release of the remaining dead hostages and will focus on the reconstruction of Gaza supervised by Egypt, Qatar and the United Nations. At this stage, Israel will be expected to fully withdraw from the Gaza Strip.

How significant is the breakthrough?

Fifteen months of war has devastated Gaza. This deal opens the possibility of ending the fighting there and could allow for the first steps toward reconstruction and stabilization in the Palestinian enclave.

It could also allow the incoming Trump administration to focus on other issues that are more central to its foreign policy agenda, such as a potential new deal with Iran and the resumption of normalization talks between Israel and Saudi Arabia, connected to the creation of a new security alliance with the U.S.

For Israel, it means the possibility of an end to its longest war, which has cost a fortune, eroded its international standing and severely divided its society between supporters and opponents of the government. It could end the state of emergency that has been in effect since Oct. 7, 2023, allowing Israeli society to begin its own recovery.

What issues remain outstanding?

There are big question marks over the later stages of the deal. Important members of Prime Minister Benjamin Netanyahu’s coalition, including Minister of National Security Itamar Ben-Gvir and Minister of Finance Bezalel Smotrich, have been accused of being more interested in a permanent occupation of the Gaza Strip than in the release of the hostages. As such, they will be loath to agree to any measures that would lead to a handing over of governance and security in the enclave to Palestinians.

Throughout the conflict, the Israel government has made it clear that it envisions no role for Hamas in a post-conflict Gaza. But Hamas’ main rival, the Palestinian Authority, has little credibility among Gaza’s residents. It leaves a gaping question of who will govern in Gaza.

There is also concern that if Israel was genuinely interested in full implementation of the deal, it could have reached an agreement that includes the complete withdrawal from Gaza in return for release of all hostages, rather than an agreement implemented in stages.

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Why did talks succeed now, but earlier attempts fail?

This deal has been on the table at least since May 2024. But Netanyahu and his government have opposed it due mainly to their desire that Israel remain in control of Gaza.

Some of his government ministers also want to establish Jewish settlements in the Gaza Strip and have explicitly spoken about creating the conditions for reducing the numbers of Palestinians in the strip.

Critics of Netanyahu have also suggested that the prime minister wanted to prolong the war as long as possible because it served him politically.

But the entry of Donald Trump into the equation after his election as U.S. president changed the dynamics between Israel, Hamas and the U.S.

Trump wants to be seen as a deal-maker on the global stage, and Netanyahu – a close ally of the Republican – feels inclined to help Trump on this matter. The timing of the deal allows Trump to claim a role, while also allowing Joe Biden to leave office with a foreign policy “win.”

A man in shorts runs past a wall with people's faces on it.
A man runs past a billboard featuring portraits of Israelis hostages. Hazem Bader/AFP via Getty Images)

There are also hopes in Israel that forging a deal now clears the way for the resumption of normalization talks between Israel and Saudi Arabia – a process kick-started under Trump’s first administration.

Netanyahu may be betting on a deal with Saudi Arabia to balance out his tarnished reputation at home as the Israeli leader in control when the Oct. 7 massacre occurred.

How will the deal play out in Israel’s fractious politics?

This is the big question that will determine the fate of the deal in the long term.

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Its provisions contradict fundamentally the aspirations of many members in Netanyahu’s ruling coalition – and they may do the best they can to sabotage it.

It is still not clear if these right-wing holdouts will exit the government or stay in the coalition under the belief that the latter phases of the deal are not going to be implemented.

What does it mean for the future of Hamas and its role in Gaza?

The agreement does not specify conditions to replace Hamas’ rule in Gaza.

Netanyahu has so far objected to any efforts to facilitate the return of the Palestinian Authority or allow any other Arab or international consortium to run civilian affairs in the strip.

Hamas, for its part, has no interest in facilitating its replacement by other governing bodies and ceding control of Gaza. But having lost key members of its leadership over the course of the war, the militant group is in a less powerful position than it was before Oct. 7.

A cynical view might be that having a weakened Hamas remain in power may actually serve Netanyahu’s interests, allowing him to manage the Israeli-Palestinian conflict rather than trying to resolve it. This had been his approach before Oct. 7, and there are no indications that it has changed.

Asher Kaufman, Professor of History and Peace Studies, University of Notre Dame

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This article is republished from The Conversation under a Creative Commons license. Read the original article.

STM Daily News is a vibrant news blog dedicated to sharing the brighter side of human experiences. Emphasizing positive, uplifting stories, the site focuses on delivering inspiring, informative, and well-researched content. With a commitment to accurate, fair, and responsible journalism, STM Daily News aims to foster a community of readers passionate about positive change and engaged in meaningful conversations. Join the movement and explore stories that celebrate the positive impacts shaping our world.

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Developments in Phoenix: Valley Metro Begins Testing Trains on South Central Extension!

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Valley Metro
Valley Metro

Great news for the residents of south-central Phoenix! As of November, 2024, Valley Metro has officially begun testing trains on the highly anticipated South Central Extension of the light rail. This new 5.5-mile route is set to enhance access to public transportation, connecting downtown Phoenix all the way to Baseline Road—bringing convenience and mobility to more neighborhoods than ever before!

Connecting Communities

The South Central Extension is more than just a transportation project; it’s a lifeline for connecting communities within Phoenix. By bridging the gap between downtown and southern areas of the city, Valley Metro aims to provide a seamless travel experience for commuters, students, and visitors alike. With access points along Washington and Jefferson streets, as well as 1st, 3rd, and Central avenues, this expansion is set to make daily commuting smoother and more efficient.

Safety First!

As trains start to roll out during this initial testing phase, safety remains a top priority. Valley Metro has issued important safety tips for both pedestrians and motorists to ensure everyone stays safe throughout the process:

  1. Follow Traffic Signals: Always obey traffic signals and make use of designated crosswalks when crossing streets near the light rail.
  2. Stay Alert: Listen for warning signals and train sounds. Light rail trains can approach quickly and quietly, so being attentive is crucial.
  3. Keep Off the Tracks: Remember, light rail trains are designed to be silent, making it easy to overlook them. Avoid standing on or near the tracks—stay safe and keep a respectful distance.
  4. Platform Access: Please refrain from entering the new station platforms during this testing phase as they are currently closed. Your safety and the safety of our testing crews is paramount.

Get Ready for 2025!

As testing ramps up towards the projected opening in mid-2025, excitement is building across the city. Whether you commute for work, school, or leisure, the South Central Extension promises to provide more accessible and efficient public transportation options. It’s a step forward in creating a more connected and vibrant Phoenix!

Stay tuned for updates from Valley Metro regarding the progress of the South Central Extension, and let’s celebrate the strides we’re taking towards a more connected, sustainable future. Phoenix, your public transport experience is about to get a whole lot better! 🚆✨

Related articles:

https://www.valleymetro.org/project/south-central-extension-downtown-hub

https://www.12news.com/article/news/local/valley/valley-metro-testing-trains-new-expansion-into-south-phoenix/75-e832f4b8-bb44-4942-9cd9-b4604a7bd403

STM Daily News is a vibrant news blog dedicated to sharing the brighter side of human experiences. Emphasizing positive, uplifting stories, the site focuses on delivering inspiring, informative, and well-researched content. With a commitment to accurate, fair, and responsible journalism, STM Daily News aims to foster a community of readers passionate about positive change and engaged in meaningful conversations. Join the movement and explore stories that celebrate the positive impacts shaping our world.

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From new commercial Moon landers to asteroid investigations, expect a slate of exciting space missions in 2025

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A host of space missions are planned to launch in 2025. AP Photo/John Raoux

Zhenbo Wang, University of Tennessee

In 2024, space exploration dazzled the world.

NASA’s Europa Clipper began its journey to study Jupiter’s moon Europa. SpaceX’s Starship achieved its first successful landing, a critical milestone for future deep space missions. China made headlines with the Chang’e 6 mission, which successfully returned samples from the far side of the Moon. Meanwhile, the International Space Station continued to host international crews, including private missions like Axiom Mission 3.

As an aerospace engineer, I’m excited for 2025, when space agencies worldwide are gearing up for even more ambitious goals. Here’s a look at the most exciting missions planned for the coming year, which will expand humanity’s horizons even further, from the Moon and Mars to asteroids and beyond:

Scouting the lunar surface with CLPS

NASA’s Commercial Lunar Payload Services, or CLPS, initiative aims to deliver science and technology payloads to the Moon using commercial landers. CLPS is what brought Intuitive Machines’ Odysseus lander to the Moon in February 2024, marking the first U.S. Moon landing since Apollo.

In 2025, NASA has several CLPS missions planned, including deliveries by companies Astrobotic, Intuitive Machines and Firefly Aerospace.

These missions will carry a variety of scientific instruments and technology demonstrations to different lunar locations. The payloads will include experiments to study lunar geology, test new technologies for future human missions and gather data on the Moon’s environment.

Surveying the sky with SPHEREx

In February 2025, NASA plans to launch the Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer, or SPHEREx, observatory. This mission will survey the sky in near-infrared light, which is a type of light that is invisible to the naked eye but that special instruments can detect. Near-infrared light is useful for observing objects that are too cool or too distant to be seen in visible light.

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SPHEREx will create a comprehensive map of the universe by surveying and collecting data on more than 450 million galaxies along with over 100 million stars in the Milky Way. Astronomers will use this data to answer big questions about the origins of galaxies and the distribution of water and organic molecules in stellar nurseries – where stars are born from gas and dust.

Studying low Earth orbit with Space Rider

The European Space Agency, or ESA, plans to conduct an orbital test flight of its Space Rider uncrewed spaceplane in the third quarter of 2025. Space Rider is a reusable spacecraft designed to carry out various scientific experiments in low Earth orbit.

These scientific experiments will include research in microgravity, which is the near-weightless environment of space. Scientists will study how plants grow, how materials behave and how biological processes occur without the influence of gravity.

Space Rider will also demonstrate new technologies for future missions. For example, it will test advanced telecommunication systems, which are crucial for maintaining communication with spacecraft over long distances. It will also test new robotic exploration tools for use on future missions to the Moon or Mars.

Exploring the Moon with M2/Resilience

Japan’s M2/Resilience mission, scheduled for January 2025, will launch a lander and micro-rover to the lunar surface.

This mission will study the lunar soil to understand its composition and properties. Researchers will also conduct a water-splitting test to produce oxygen and hydrogen by extracting water from the lunar surface, heating the water and splitting the captured steam. The generated water, oxygen and hydrogen can be used for enabling long-term lunar exploration.

file 20241126 15 1jr5t7

This mission will also demonstrate new technologies, such as advanced navigation systems for precise landings and systems to operate the rover autonomously. These technologies are essential for future lunar exploration and could be used in missions to Mars and beyond.

The M2/Resilience mission is part of Japan’s broader efforts to contribute to international lunar exploration. It builds on the success of Japan’s Smart Lander for Investigating Moon, or SLIM, mission, which landed on the Moon using a precise landing technique in March 2024.

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Investigating an asteroid with Tianwen-2

China’s Tianwen-2 mission is an ambitious asteroid sample return and comet probe mission. Scheduled for launch in May 2025, Tianwen-2 aims to collect samples from a near-Earth asteroid and study a comet. This mission will advance scientists’ understanding of the solar system’s formation and evolution, building on the success of China’s previous lunar and Mars missions.

The mission’s first target is the near-Earth asteroid 469219 Kamoʻoalewa. This asteroid is a quasi-satellite of Earth, meaning it orbits the Sun but stays close to Earth. Kamoʻoalewa is roughly 131-328 feet (40-100 meters) in diameter and may be a fragment of the Moon, ejected into space by a past impact event.

By studying this asteroid, scientists hope to learn about the early solar system and the processes that shaped it. The spacecraft will use both touch-and-go and anchor-and-attach techniques to collect samples from the asteroid’s surface.

After collecting samples from Kamoʻoalewa, Tianwen-2 will return them to Earth and then set course for its second target, the main-belt comet 311P/PANSTARRS. This comet is located in the asteroid belt between Mars and Jupiter.

By analyzing the comet’s materials, researchers hope to learn more about the conditions that existed in the early solar system and possibly the origins of water and organic molecules on Earth.

Solar system flybys

Besides the above planned launch missions, several space agencies plan to perform exciting deep-space flyby missions in 2025.

A flyby, or gravity assist, is when a spacecraft passes close enough to a planet or moon to use its gravity for a speed boost. As the spacecraft approaches, it gets pulled in by the planet’s gravity, which helps it accelerate.

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After swinging around the planet, the spacecraft is flung back out into space, allowing it to change direction and continue on its intended path using less fuel. https://www.youtube.com/embed/0iAGrdITIiE?wmode=transparent&start=0 Spacecraft can fly by a planet to get a boost using gravity.

BepiColombo, a joint mission by ESA and the Japan Aerospace Exploration Agency, JAXA, will make its sixth flyby of Mercury in January 2025. This maneuver will help the spacecraft enter orbit around Mercury by November 2026. BepiColombo aims to study Mercury’s composition, atmosphere and surface geology.

NASA’s Europa Clipper mission, which launched in October 2024, will make significant progress on its journey to Jupiter’s moon Europa. In March 2025, the spacecraft will perform a flyby maneuver at Mars.

This maneuver will help the spacecraft gain the necessary speed and trajectory for its long voyage. Later in December 2026, Europa Clipper will perform a flyby of Earth, using Earth’s gravity to further increase its momentum so it can arrive at Europa in April 2030.

The ESA’s Hera mission will also perform a flyby of Mars in March 2025. Hera is part of the Asteroid Impact and Deflection Assessment mission, which plans to study the Didymos binary asteroid system. The mission will provide valuable data on asteroid deflection techniques and contribute to planetary defense strategies.

NASA’s Lucy mission will continue its journey to explore the Jupiter Trojan asteroids, which share Jupiter’s orbit around the Sun, in 2025. One key event for Lucy is its flyby of the inner main-belt asteroid 52246 Donaldjohanson, scheduled for April 20, 2025.

This flyby will provide valuable data on this ancient asteroid’s composition and surface features, which can help researchers gain insights into the early solar system. The asteroid is named after the paleoanthropologist who discovered the famous “Lucy” fossil.

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ESA’s Jupiter Icy Moons Explorer, or JUICE, mission will perform a Venus flyby in August 2025. This maneuver will help JUICE gain the necessary speed and trajectory for its journey to Jupiter. Once it arrives, JUICE will study Jupiter’s icy moons to understand their potential for harboring life.

2025 promises to be a groundbreaking year for space exploration. With NASA’s ambitious missions and significant contributions from other countries, we are set to make remarkable strides in humanity’s understanding of the universe. These missions will not only advance scientific knowledge but also inspire future generations to look to the stars.

Zhenbo Wang, Associate Professor of Mechanical, Aerospace and Biomedical Engineering, University of Tennessee

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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