Water Drop Discovered on Asteroid Hints at Origins of Life on Earth

Published

2 years ago

October 5, 2022

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Specks of dust retrieved by a Japanese space probe from an asteroid some 300 million kilometres from Earth have revealed a surprising component: a drop of water, scientists said Friday. The discovery offers new support for the theory that life on Earth was seeded from outer space.

The findings are in the latest research to be published from the analysis of 5.4 grams of rocks and dust gathered by the Hayabusa-2 probe from the asteroid Ryugu.

“This drop of water has great meaning,” lead scientist Tomoki Nakamura of Tohoku University told reporters ahead of the research’s publication in the journal Science on Friday.

“Many researchers believe that water was brought (from outer space) but we actually discovered water in Ryugu, an asteroid near Earth, for the first time.”

F, and returned to Earth’s orbit two years ago to drop off a capsule containing the sample.

The precious cargo has already yielded several insights, including organic material that showed some of the building blocks of life on Earth, amino acids, may have been formed in space.

The research published Friday says the team found a drop of fluid in the Ryugu sample “which was carbonated water containing salt and organic matter”, Nakamura said.

That bolsters the theory that asteroids like Ryugu, or its larger parent asteroid, could have “provided water, which contains salt and organic matter” in collisions with Earth, Nakamura said.

“We have discovered evidence that this (process) may have been directly linked to, for example, the origin of the oceans or organic matter on Earth.”

Nakamura’s team, comprising about 150 researchers – including 30 from the United States, Britain, France, Italy, and China – is one of the largest teams analysing the sample from Ryugu.

The sample has been divided among different scientific teams to maximise the chance of new discoveries.

Kensei Kobayashi, an astrobiology expert and professor emeritus at Yokohama National University who is not part of the research group, hailed the discovery.

“The fact that water was discovered in the sample itself is surprising,” given its fragility and the chances of it being destroyed in outer space, he told AFP.

“It does suggest that the asteroid contained water – in the form of fluid and not just ice – and organic matter may have been generated in that water.”

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Science

Will Earth’s Gravity Alter Apophis Asteroid in 2029? Find Out!

Published

3 hours ago

November 14, 2024

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Will Earth’s Gravity Alter Apophis Asteroid in 2029? Find Out!

A close encounter between Earth and asteroid 99942 Apophis is expected to take place in April 2029. Named after an ancient Egyptian deity associated with darkness and disorder, Apophis will pass within 32,000 kilometres (20,000 miles) of Earth. According to recent simulations by Johns Hopkins University Applied Physics Laboratory, this event could cause significant shifts on the asteroid’s surface due to Earth’s gravitational influence.

Surface Disturbance Predicted by Simulation

The study was led by planetary scientist Dr Ronald Ballouz and was published The Planetary Science Journal. It suggests that Apophis‘ proximity to Earth might create seismic disturbances on its surface. These effects could cause surface movements that are measurable from Earth, giving scientists an unprecedented opportunity to observe near-Earth asteroids in a unique way. The asteroid, approximately 335 metres (1,100 feet) across, was initially calculated to be on a potential collision course with Earth upon its discovery in 2004. Current analysis has confirmed that there is no threat of impact in the foreseeable future.

Possible Impact on the Asteroid’s Rotation

As per a report by Space.com, another expected outcome is a change in Apophis’ rotational state. As it nears Earth, gravitational forces may alter its spin, which could result in surface reshaping as the asteroid continues orbiting the Sun over time. Past research has noted that asteroids showing less space-weathering than anticipated, like 25143 Itokawa, may owe these qualities to close planetary flybys. This particular flyby will thus allow scientists to study such transformations directly.

An Opportunity for Observation

As Apophis is projected to be visible without telescopes during its approach. As reported, researchers anticipate capturing detailed images of any changes. The findings from this study are expected to deepen understanding of how close encounters impact near-Earth objects, potentially influencing future research and asteroid-monitoring efforts.

Science

NASA Astronaut Sunita Williams Refutes Health Concerns Amid ISS Mission

Published

14 hours ago

November 13, 2024

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NASA Astronaut Sunita Williams Refutes Health Concerns Amid ISS Mission

NASA astronaut Sunita Williams has recently addressed speculations surrounding her health condition while on the International Space Station (ISS), discarding recent claims made by media outlets regarding her wellbeing. In response to reports that suggested she appeared “gaunt” due to an extended stay on the ISS, Williams clarified her status during a video interview on November 12, explaining that her weight has remained unchanged since her arrival in orbit.

Routine Exercise and Physical Adaptations

Williams, who commands Expedition 72 aboard the ISS, responded to health concerns publicly, indicating that any changes in her physical appearance are the result of rigorous exercise routines rather than health deterioration. Like all astronauts on extended missions, she has been following an intense workout regimen designed to counteract the muscle and bone density loss commonly associated with prolonged microgravity exposure. Williams stated that her routine includes running on a treadmill, riding an exercise bike and lifting weights. It is a form of exercise that has led to increased muscle mass, particularly in her thighs and glutes, while her overall weight remains consistent.

NASA’s Statement on Crew Health

NASA had previously denied the reports, emphasising that Williams and her fellow crew members, including NASA astronaut Butch Wilmore, are in good health. Williams and Wilmore, who arrived at the ISS on June 6 aboard Boeing’s Starliner capsule, were initially scheduled for a ten-day mission under the Crew Flight Test programme. Technical issues with Starliner’s thrusters led NASA to extend their stay on the ISS until early 2025, when they are expected to return with SpaceX’s Crew-9 mission astronauts.

Current ISS Crew Status

The current ISS team, led by Williams, includes three NASA astronauts and three Russian cosmonauts, all working collaboratively despite recent media scrutiny. Williams assured viewers that her health and morale remain robust as the crew carries out essential research and maintenance tasks on the orbiting laboratory showing NASA’s confidence in their well-being during extended missions.

Science

Math reveals secrets to gaining height on a half-pipe

Published

17 hours ago

November 13, 2024

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Math reveals secrets to gaining height on a half-pipe

A recent study reveals how skateboarders can use mathematical insights to increase their speed and height on half-pipes. Florian Kogelbauer, a mathematician from ETH Zurich, and his research team have examined how specific movements impact a skateboarder’s performance on U-shaped ramps. By alternating between crouching and standing in certain areas, skaters can generate extra momentum, leading to higher jumps and faster speeds. This research, published in Physical Review Research, could lead to more efficient techniques for skaters aiming to improve their skills.

Modelling Momentum on Half-Pipes

The research was published in American Physical Society Journal. The technique of “pumping,” or alternating between crouching and standing, is essential for building speed on half-pipes. Kogelbauer’s team created a model to show how the body’s centre of mass affects movement on a ramp, much like the mechanics of a swing. In their calculations, they found that crouching while moving downhill and standing while moving uphill helps skaters gain height more effectively. This rhythm, the team suggests, could help skaters reach higher elevations on the ramp in fewer motions.

Testing the Theory with Real Skaters

To test the model’s validity, researchers observed two skateboarders as they navigated a half-pipe. They were asked to reach a specific height as quickly as possible. Video analysis revealed that the more experienced skater naturally followed the model’s suggested pattern, reaching the target height with fewer motions. The less experienced skater, who did not follow the pattern as precisely, required more time to reach the same height. This contrast suggests that experienced skaters intuitively apply these principles for better performance.

Broader Applications Beyond Skateboarding

According to Sorina Lupu, an engineer at the California Institute of Technology, this simplified model may also have applications in robotics. By demonstrating how minimal adjustments in body position can impact speed and height, this study offers insights that could make robotic movement more efficient. For engineers, this research indicates that straightforward models of human movement could be used to enhance robotic performance, providing an alternative to complex machine-learning models often used in robotics.