Category Astronomy/Space

Asteroid Ryugu’s Rocky Past

Four images of grey rocks
Surface Rocks. Hayabusa2 captures images of unusually bright S-type rocks that stand out from the darker C-type material that makes up the bulk of Ryugu. © 2020 Tatsumi et al.

Different kinds of rocks on Ryugu provide clues to the asteroid’s turbulent history. Researchers find evidence that asteroid Ryugu was born out of the possible destruction of a larger parent asteroid millions of years ago. Thanks to the Hayabusa2 spacecraft, the international team was able to study certain surface features in detail. Variations in the kinds of boulders scattered on Ryugu tell researchers about the processes involved in its creation. The study of asteroids including Ryugu informs the study of the evolution of life on Earth.

The asteroid Ryugu may look like a solid piece of rock, but it’s more ...

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The first Ultra-Hot Neptune, LTT 9779b, is one of nature’s improbable planets

The Ultra Hot Neptune. Credit: Ricardo Ramirez

An international team of astronomers, including a group from the University of Warwick, have discovered the first Ultra Hot Neptune planet orbiting the nearby star LTT 9779.

The world orbits so close to its star that its year lasts only 19 hours, meaning the stellar radiation heats the planet to over 1700 degrees Celsius.

At these temperatures, heavy elements like iron can be ionized in the atmosphere and molecules disassociated, providing a unique laboratory to study the chemistry of planets outside the solar system.

Although the world weighs twice as much as Neptune does, it is also slightly larger and so has a similar density...

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Comet discovered to have its own Northern Lights

Image acquired by the navigation camera on the European Space Agency’s Rosetta spacecraft orbiting Comet 67P/Churyumov-Gerasimenko between Nov. 19 and Dec. 3, 2014. Image credit: ESA/Rosetta/NAVCAM

An atmospheric light show previously relegated to planets and Jupiter moons is found on comet using data from ESA’s Rosetta spacecraft. Data from NASA instruments aboard the ESA (European Space Agency) Rosetta mission have helped reveal that comet 67P/Churyumov-Gerasimenko has its own far-ultraviolet aurora. It is the first time such electromagnetic emissions in the far-ultraviolet have been documented on a celestial object other than a planet or moon. A paper on the findings was released today in the journal Nature Astronomy.

On Earth, aurora (also known as the northern or southern light...

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Device could Help Detect Signs of Extraterrestrial Life

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A fully automated microchip electrophoresis analyzer could someday be deployed in the search for life on other worlds.
Credit: Adapted from Analytical Chemistry 2020, DOI: 10.1021/acs.analchem.0c01628

Although Earth is uniquely situated in the solar system to support creatures that call it home, different forms of life could have once existed, or might still exist, on other planets. But finding traces of past or current lifeforms on other worlds is challenging. Now, researchers reporting in ACS’ Analytical Chemistry have developed a fully automated microchip electrophoresis analyzer that, when incorporated into a planetary rover, could someday detect organic biosignatures in extraterrestrial soil.

One critical piece of evidence for life beyond Earth is the presence of certain organic...

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