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Space Exploration Nov 28, 2023

Aerocapture is a 'free lunch' in space exploration

When spacecraft return to Earth, they don't need to shed all their velocity by firing retro-rockets. Instead, they use the atmosphere as a brake to slow down for a soft landing. Every planet in the solar system except Mercury ...

Planetary Sciences Nov 27, 2023

What would happen to Earth if a rogue star came too close?

Stars are gravitationally fastened to their galaxies and move in concert with their surroundings. But sometimes, something breaks the bond. If a star gets too close to a supermassive black hole, for example, the black hole ...

Archaeology Nov 9, 2023

Archaeological skull fragments from Ukraine reveal early modern humans came from the East

How did our species, Homo sapiens, arrive in Western Europe? Published in Nature Ecology & Evolution, our new study analyzes two skull fragments dating back between 37,000 and 36,000 years to conclude that our ancestors came ...

Astronomy Nov 9, 2023

Glow in the visible range detected for the first time in the Martian night

A scientific team led by researchers from the Laboratory for Planetary and Atmospheric Physics (LPAP) at the University of Liège (BE) has just observed, for the first time, lights in the night sky over Mars using the UVIS-NOMAD ...

Planetary Sciences Nov 8, 2023

Presence of atomic oxygen confirmed on both day and night sides of Venus

A multi-institutional team of astrophysicists from Germany has made the first direct observation of oxygen atoms in the day side atmosphere of Venus. In their project, reported in the journal Nature Communications, the group ...

Astrobiology Oct 31, 2023

Want to find life? Compare a planet to its neighbors

With thousands of known exoplanets and tens of thousands likely to be discovered in the coming decades, it could be only a matter of time before we discover a planet with life. The trick is proving it. So far the focus has ...

Astronomy Oct 26, 2023

Venus had Earth-like plate tectonics billions of years ago, study suggests

Venus, a scorching wasteland of a planet according to scientists, may have once had tectonic plate movements similar to those believed to have occurred on early Earth, a new study found. The finding sets up tantalizing scenarios ...

Earth Sciences Oct 17, 2023

We landed a camera on Venus before seeing parts of our own oceans—time to ramp up observations closer to home

Viewed from the Voyager 1 space probe as it passed beyond the edge of the solar system, Earth and Venus might not look too different—same diameter, similar mass and distance from the sun.

Space Exploration Oct 8, 2023

Study quantifies satellite brightness, challenges ground-based astronomy

The ability to have access to the Internet or use a mobile phone anywhere in the world is taken more and more for granted, but the brightness of Internet and telecommunications satellites that enable global communications ...

Planetary Sciences Oct 6, 2023

Can JWST tell the difference between an exoEarth and an exoVenus?

As of October 2023, astronomers have discovered 5,506 exoplanets orbiting other stars. That number is growing daily, and astronomers are hoping, among other things, to find Earth-like worlds. But will we know one when we ...

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