News
NASA’s Psyche En Route to Asteroid: Unlocking the Secrets of Planet Formation
On Earth, the planet’s iron core is responsible for the magnetic field that shields our atmosphere and enables life.
Led by Arizona State University on NASA’s behalf, the $1.2 billion mission will use a roundabout route to get to the asteroid. The van-size spacecraft with solar panels big enough to fill a tennis court will swoop past Mars for a gravity boost in 2026. Three years later, it will reach the asteroid and attempt to go into orbit around it, circling as high as 440 miles (700 kilometers) and as close as 47 miles (75 kilometers) until at least 2031.
The spacecraft relies on solar electric propulsion, using xenon gas-fed thrusters and their gentle blue-glowing pulses. An experimental communication system is also along for the ride, using lasers instead of radio waves in an attempt to expand the flow of data from deep space to Earth. NASA expects the test to yield more than 10 times the amount of data, enough to transmit videos from the moon or Mars one day.
The spacecraft should have soared a year ago, but was held up by delays in flight software testing attributed to poor management and other issues. The revised schedule added extra travel time. So instead of arriving at the asteroid in 2026 as originally planned, the spacecraft won’t get there until 2029.
That’s the same year that another NASA spacecraft — the one that just returned asteroid samples to the Utah desert — will arrive at a different space rock as it buzzes Earth.
On October 13, 2023, NASA’s Psyche spacecraft embarked on an extraordinary journey to study an asteroid of the same name. Carried by a SpaceX Falcon Heavy rocket, Psyche’s mission is to investigate this metal-rich world and provide invaluable insights into the formation of rocky planets. Accompanying this ambitious endeavor is NASA’s Deep Space Optical Communications technology demonstration, which will test laser communications beyond the Moon, paving the way for future exploration missions.
The Psyche Mission
A Historic Launch:
Amidst great anticipation, Psyche successfully launched from NASA’s Kennedy Space Center in Florida. This momentous event marked the first-ever voyage to a metal-rich asteroid. As the spacecraft soared towards its destination, the fairings detached from the rocket, returning to Earth, and an hour later, Psyche separated from the rocket, preparing for the next phase of its mission.
Unveiling the Mysteries of Psyche:
Psyche promptly entered a planned safe mode, awaiting further commands from mission controllers on Earth. The spacecraft established communication with NASA’s Deep Space Network complex in Canberra, Australia, confirming its good health. With two-way communication established, scientists eagerly anticipate the treasure trove of scientific knowledge that Psyche will unlock.
A Metal World to Explore:
By August 2029, Psyche will begin orbiting the 173-mile-wide asteroid, becoming the first mission to explore a metal-class asteroid. With its high iron-nickel content, Psyche may be the remnant core of a planetesimal, offering valuable insights into the early stages of planet formation. This 26-month science investigation holds immense potential for expanding our understanding of the universe and our place within it.
The Journey and Propulsion System:
Psyche’s journey to the main asteroid belt between Mars and Jupiter spans six years and covers a distance of 2.2 billion miles. Powered by solar electric propulsion, the spacecraft employs charged atoms of xenon gas to create thrust, gently propelling it forward. Along the way, Psyche will utilize Mars’ gravity as a slingshot, further accelerating its journey towards the asteroid.
The Commissioning Phase:
The initial 100 days of the mission comprise a commissioning phase, during which all flight systems undergo thorough checks to ensure their health. Of particular importance is the readiness of the electric thrusters to continuously fire over long stretches of the trajectory. Simultaneously, the science instruments, including a magnetometer, gamma-ray and neutron spectrometer, and multispectral imager, will undergo active checkout.
Advancing Optical Communications:
One of the significant technological advancements accompanying the Psyche mission is NASA’s Deep Space Optical Communications technology demonstration. Approximately three weeks into the mission, when Psyche is approximately 4.7 million miles away from Earth, this technology will be powered on. This marks NASA’s first test beyond the Moon of high-data-rate optical communications, a critical capability for future space exploration.
As Psyche embarks on its mission to unravel the mysteries of the metal-rich asteroid, excitement and anticipation fill the air. The discoveries made during this journey hold the potential to reshape our understanding of planet formation and evolution. Moreover, the technological advancements demonstrated by the Deep Space Optical Communications technology will pave the way for bolder goals and greater achievements in space exploration. NASA’s commitment to exploring the unknown and inspiring the world through discovery has never been stronger.
More Mission Information
Arizona State University leads the Psyche mission. A division of Caltech in Pasadena, JPL is responsible for the mission’s overall management, system engineering, integration and test, and mission operations. Maxar Space in Palo Alto, California, provided the high-power solar electric propulsion spacecraft chassis.
JPL manages the Deep Space Optical Communications project for the Technology Demonstration Missions program within STMD and the Space Communications and Navigation Program within the Space Operations Mission Directorate.
NASA’s Launch Services Program, based at Kennedy Space Center, is responsible for the insight and approval of the launch vehicle and manages the launch service for the Psyche mission. NASA certified the SpaceX Falcon Heavy rocket for use with the agency’s most complex and highest priority missions in early 2023 at the conclusion of a 2.5-year effort.
Psyche is the 14th mission selected as part of NASA’s Discovery Program, managed by the agency’s Marshall Space Flight Center in Huntsville, Alabama.
For more information about NASA’s Psyche mission go to:
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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recipes
Keep Your Kitchen Clear with an Ooey-Gooey Appetizer for Guests
(Culinary.net) Prepping for Thanksgiving gatherings is plenty of work on its own, and when family and guests can’t stay out of your way in the kitchen, you’ll need the perfect appetizer as a distraction. This Loaded Spinach Dip offers a little something for everyone with ooey-gooey goodness and just the right touch of bacon.
Find more shareable holiday appetizers by visiting Culinary.net.
Loaded Spinach Dip
Recipe courtesy of “Cookin’ Savvy”
Servings: 8-10
- 16 ounces softened cream cheese
- 1/2 cup mayo
- 1/2 cup sour cream
- 10 ounces thawed spinach
- 14 ounces drained canned artichoke hearts, roughly chopped
- 1 package (2 1/2 ounces) real bacon pieces
- 1 cup Parmesan cheese
- 1 cup mozzarella cheese
- 1 tablespoon garlic powder
- 1 tablespoon onion powder
- salt, to taste
- pepper, to taste
- pretzel bites, toasted baguette slices, crackers or veggies, for serving
- Heat oven to 375 F.
- In large bowl, mix cream cheese, mayo and sour cream. Add spinach, artichoke hearts, bacon, Parmesan and mozzarella. Mix in garlic powder and onion powder. Add salt and pepper, to taste.
- Spoon into oven-safe skillet or baking dish and bake 20-25 minutes. Serve with pretzel bites, toasted baguette slices, crackers or veggies.
SOURCE:
Culinary.net
At our core, we at STM Daily News, strive to keep you informed and inspired with the freshest content on all things food and beverage. From mouthwatering recipes to intriguing articles, we’re here to satisfy your appetite for culinary knowledge.
Visit our Food & Drink section to get the latest on Foodie News and recipes, offering a delightful blend of culinary inspiration and gastronomic trends to elevate your dining experience.
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News
Untreated sewage and fertilizer runoff threaten the Florida manatee’s main food source, contributing to malnutrition
Aarin-Conrad Allen, Florida International University
The gentle, slow-moving Florida manatee has no natural predators.
And yet, these charismatic mammals face numerous threats.
Manatees are struck by vessels in busy waterways across the state, and a majority bear scars from these collisions.
Harmful algal blooms – characterized by the rapid growth of algae that degrades water quality – can impair their nervous systems.
With less blubber, or fat, compared with other marine mammals like whales, dolphins, seals and sea lions, manatees are vulnerable to cold-stress syndrome during winter months.
And they can ingest or get entangled in marine debris like derelict fishing gear and drown or be crushed by floodgate and water control structures.
I am a doctoral candidate in marine biology at Florida International University’s Institute of Environment. Over the past 15 years, I have gained extensive experience working with marine mammals, particularly manatees.
Recently, my colleagues at the United States Geological Survey, Florida Department of Environmental Protection and I documented a change in the dietary pattern of manatees. We found that manatees are eating less seagrass – traditionally their primary food source – and more algae than in decades past. This change occurred along Florida’s Atlantic coast during a period of extensive seagrass decline.
We believe this represents an emerging threat to the species’ survival.
Protected species
Manatees were listed as an endangered species under the Endangered Species Act of 1973. By the early 1990s, the manatee population in Florida had dwindled to less than 1,300.
Researchers believe that federal protection, along with additional state measures such as slow-speed zones and no-entry refuges, has contributed to the growth of the manatee population in Florida.
In 2017, manatees were reclassified from endangered to threatened. Surveyors counted 5,733 individual manatees during a statewide aerial survey conducted in 2019.
Florida manatees average 9-12 feet (2.7-3.7 meters) in length and typically weigh about 1,000 pounds (450 kilograms), but they can grow as large as 3,500 pounds (1,600 kilograms). As the largest fully aquatic herbivore, they consume 5% to 10% of their body weight in vegetation each day.
While manatees eat a broad diet of over 60 different plants, they most commonly feed on species of seagrass. Seagrasses are marine plants that, like land plants, have leaves, flowers, roots and seeds, and make their food through photosynthesis.
So what happens when these seagrasses are no longer available?
A changing estuary
The Indian River Lagoon is an estuary along Florida’s east coast that covers roughly 350 square miles (560 square kilometers) between the mainland and barrier islands, from Ponce Inlet to Jupiter Inlet.
It is a critical habitat for manatees, which feed on native seagrass meadows in the lagoon during their seasonal migrations.
Seagrasses are vital to the health of marine ecosystems. They are a habitat for juvenile fish and other marine organisms, provide food for aquatic herbivores, reduce carbon in the atmosphere and improve water quality. They also protect coastal habitats by stabilizing sediments and reducing wave energy that can erode shorelines and damage coastal infrastructure, especially during hurricanes.
For more than a decade, the Indian River Lagoon has experienced extensive loss of seagrass meadows, due to a series of algae blooms associated with nutrient runoff and degraded water quality from septic overflow leaching into the environment.
When untreated sewage and fertilizers flow into the estuary, they add nitrogen, phosphorus and other nutrients that drive excessive algal growth. These harmful algal blooms deplete oxygen levels and block sunlight, which seagrass needs for photosynthesis.
Between 2011 and 2019, over 50% of all seagrass in the lagoon was lost. This led to an increase in macroalgae and even led to a change in the animal communities that live in the lagoon. For example, among finfish, sheepshead populations declined, while seabream numbers increased. Invertebrate communities were also affected, with bryozoans colonizing areas previously dominated by barnacles.
Manatees along the Atlantic coast have suffered two unusual mortality events since the seagrass decline, including one that is ongoing. Researchers attribute the increase in manatee deaths to malnutrition due to a shortage of seagrasses in the Indian River Lagoon.
A shift in manatees’ diet
In our study, we examined 193 manatee stomach samples collected from carcasses recovered from the Indian River Lagoon during two time periods – one before and one after the onset of the seagrass loss in 2011.
We compared stomach sample contents from carcasses collected between 1977 and 1989 with samples collected between 2013 and 2015.
Our findings indicate that manatees consumed 45% less seagrass and 74% more algae after the seagrass decline.
Recently, in a study supported by FIU’s Center for Aquatic Chemistry and Environment, I investigated differences in the nutritional composition – like protein, fat, carbohydrate and fiber – of items identified in manatee stomach samples. My preliminary results show notable differences in the nutritional composition of seagrass and algae.
Marine mammals are particularly vulnerable to dietary shifts due to their large size and high energy demands. Such changes can worsen their physical health and increase the likelihood of starvation.
Depleted oxygen levels are having a similar impact on aquatic vegetation and seagrass meadows in other regions of Florida, like Biscayne Bay and the Caloosahatchee River and Estuary. This suggests that the ecological challenges seen in the Indian River Lagoon could become more widespread.
What is the solution?
Remediation efforts within the lagoon have incorporated the restoration of seagrass through aquaculture and replanting strategies, similar to efforts to restore coral reefs.
While the lagoon’s seagrass has recently shown signs of regrowth, the rehabilitation of the ecosystem must begin with improving and maintaining water quality.
Counties along the lagoon have enacted fertilizer bans that aim to reduce the levels of nitrogen and phosphorus in the water that drive algal blooms.
New research, however, indicates that these restrictions alone will not fix the problem, as residential septic systems are the primary source of nutrient pollution in the lagoon.
Furthermore, many of the factors contributing to harmful algal blooms are intensified by global warming and changing climate, which could accelerate the decline of seagrass in Florida and elsewhere.
Given the multiple, synergistic threats facing manatees, I believe that improving water quality, protecting their food sources, and further research – coupled with community outreach and education – are critical to ensure the long-term survival of this iconic Florida species.
Aarin-Conrad Allen, Ph.D. Candidate in Marine Sciences, Florida International University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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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College Life
Campus diversity is becoming difficult to measure as students keep their race and ethnicity hidden on college applications
When the Supreme Court struck down race-based admissions at American colleges and universities just over a year ago, many predicted U.S. campuses would become much less diverse. But in part due to students who decide not to disclose their race or ethnicity, coupled with universities’ selective use of statistics, it is not clear how much the decision has affected diversity on campus.
As higher education institutions begin reporting the racial makeup of the class of 2028 – the first to be affected by the 2023 decision – the data is hard to interpret, confusing and inconclusive.
As a sociologist who has studied how institutions of higher education collect and report data on race and ethnicity, I have identified some factors that contribute to this lack of clarity.
Students don’t identify with choices given
Some students may not select a racial or ethnic category because they don’t believe any of the categories really fit. For example, before multiracial students could select “one or more,” an option that became widely available in 2010, they were more likely to decline to identify their race or ethnicity. Some even boycotted checkboxes entirely.
Other students don’t view their race as important: 67% of the students who choose “race and ethnicity unknown” are white. Of these students, 33% say race and ethnicity are not a relevant part of their identity, a researcher found in 2008.
The number of students who don’t respond to questions about race or ethnicity – and are listed in the “race unknown” category – is increasing. At Harvard University, for example, the percentage of “race-unknown” undergrad students doubled from 2023 to 2024.
As the number of “race unknown” students grows, it not only becomes harder to determine a student body’s ethnic and racial diversity but also the impact of the ban on race-conscious admissions.
Fearing discrimination, students don’t disclose race
Some students believe their race or ethnicity will harm their chances of admission.
This is particularly true at many selective institutions, which have higher nonresponse rates than less selective institutions, about 4% compared with 1% to 2%.
My research shows that students are even more likely to pass on identifying race or ethnicity at selective law schools, where race and ethnicity could be used among a variety of criteria for admissions before the Supreme Court ruled against that practice. An average of 8% of students at those schools chose not to identify, compared with 4% at less selective law schools.
‘We’re very diverse’: University decisions distort statistics
What a university chooses to report will also affect the student body demographic data the public sees. Harvard, for example, does not report its proportion of white students.
Some institutions use statistics strategically to appear more diverse than they are. These strategies include counting multiracial students multiple times – once for each race selected – or including international students as a separate category in demographic pie charts. The greater the number of different-colored slices on the chart, the more demographically “diverse” an institution appears to be.
Impact of Supreme Court ruling: Clearer picture coming soon
While universities may not all report their student demographics the same way in their own materials, they all have to report it the same way to the federal government – namely, to its Integrated Post Secondary Education Data System, better known as IPEDS. The next IPEDS report on characteristics for the 2024 enrollment class is expected to be released in spring 2025. Once that data is available, a better picture of how the Supreme Court’s decision has affected diversity in college enrollment should emerge.
That clearer picture might not last long. In 2027, the federal government will require colleges and universities to make changes to how they report student race and ethnicity. Among the changes is the addition of a Middle Eastern and North African category. Under the current standard, Middle Eastern and North African students are counted as white. As a result, white enrollment at some colleges and universities will appear to decline after 2027.
The new standards will also change the way universities treat Hispanic or Latino ethnicity on enrollment forms. Today, if students self-identify as Hispanic and white, they will be categorized as Hispanic. If students select Hispanic and white in 2027, they will be categorized as multiracial. The revised categories will muddy the impact of the Supreme Court’s decision. A drop in the number of Hispanic students reported could be due to the court’s ruling. Or it may result from the new way students will be counted.
Until universities and colleges adjust to the new guidelines about collecting and reporting race – and as long as students decline to provide their racial identities – the full effect of banning consideration of race in college admissions will remain a cloudy picture at best.
Karly Sarita Ford, Associate Professor of Education and Sociology, Penn State
This article is republished from The Conversation under a Creative Commons license. Read the original article.
The Bridge is a section of the STM Daily News Blog meant for diversity, offering real news stories about bona fide community efforts to perpetuate a greater good. The purpose of The Bridge is to connect the divides that separate us, fostering understanding and empathy among different groups. By highlighting positive initiatives and inspirational actions, The Bridge aims to create a sense of unity and shared purpose. This section brings to light stories of individuals and organizations working tirelessly to promote inclusivity, equality, and mutual respect. Through these narratives, readers are encouraged to appreciate the richness of diverse perspectives and to participate actively in building stronger, more cohesive communities.
https://stmdailynews.com/the-bridge
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