Category Astronomy/Space

Astronomers find that Two Exoplanets may be Mostly Water

Artistic representation of the planetary system of the star Kepler-138. We see Kepler-138 d in the foreground, and closer to the star, Kepler-138 c. These two planets are probably composed mainly of water. The small planet Kepler-138 b is seen transiting in front of the star. A fourth planet, Kepler-138 e, is further away and not visible in the image.
Artistic representation of the planetary system of the star Kepler-138. We see Kepler-138 d in the foreground, and closer to the star, Kepler-138 c. These two planets are probably composed mainly of water. The small planet Kepler-138 b is seen transiting in front of the star. A fourth planet, Kepler-138 e, is further away and not visible in the image.
CREDIT: STSCI.

A team led by UdeM astronomers has found evidence that two exoplanets orbiting a red dwarf star are “water worlds,” planets where water makes up a large fraction of the volume. These worlds, located in a planetary system 218 light-years away in the constellation Lyra, are unlike any planets found in our solar system.

The team, led by PhD student Caroline Piaulet of the Trottier Institute for Research on Exoplanets (iREx) ...

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Antihelium Nuclei as Messengers from the Depths of the Galaxy

Artistic illustration of antihelium annihilation in the  ALICE detector at CERN as well as in the universe.
Artistic illustration of antihelium annihilation in the ALICE detector at CERN as well as in the universe.

New findings lay the foundation for the search for dark matter. How are galaxies born, and what holds them together? Astronomers assume that dark matter plays an essential role. However, as yet it has not been possible to prove directly that dark matter exists. A research team including Technical University of Munich (TUM) scientists has now measured for the first time the survival rate of antihelium nuclei from the depths of the galaxy – a necessary prerequisite for the indirect search for Dark Matter.

Many things point to the existence of dark matter...

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VLA and ALMA study Jupiter and Io

VLA and ALMA study Jupiter and Io
Detail from a VLA image of Jupiter made in conjunction with observations by the Juno spacecraft in orbit around that planet. Credit: Moeckel, et al., Bill Saxton, NRAO/AUI/NSF

VLA teams up with Juno spacecraft to study Jupiter’s atmosphere, and ALMA reveals new details about Io’s volcanoes. While the National Science Foundation’s Karl G. Jansky Very Large Array (VLA) and the Atacama Large Millimeter/submillimeter Array (ALMA) frequently reveal important new facts about objects far beyond our own Milky Way Galaxy — at distances of many millions or billions of light-years — they also are vital tools for unraveling much closer mysteries, right here in our own Solar System...

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Discovering Rare Red Spiral Galaxy Population from Early Universe with the James Webb Space Telescope

Morphology of galaxies contain important information about the process of galaxy formation and evolution. With its state-of-the-art resolution, NASA’s James Webb Space Telescope has now captured several red spiral galaxies in its first image at an unprecedented resolution. Researchers have now analyzed these galaxies, revealing that these are among the furthest known spiral galaxies till date. The analysis further detected a passive red spiral galaxy in the early universe, a surprising discovery.

Spiral galaxies represent one of the most spectacular features in our universe. Among them, spiral galaxies in the distant universe contain significant information about their origin and evolution...

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