Category Astronomy/Space

Astronomy: Is Overeating to blame for Bulges in Milky Way Bar?

A Milky-Way-like galaxy simulated by the supercomputer ATERUI II. Stars are clustered in a bar shape near the center of the galaxy. (Credit: Junichi Baba, Hirotaka Nakayama, 4D2U Project, NAOJ)

A new simulation conducted on the world’s most powerful supercomputer dedicated to astronomy has produced a testable scenario to explain the appearance of the bar of the Milky Way. Comparing this scenario to data from current and future space telescopes will help clarify the evolution of our home Galaxy.

Astronomy is revealing the structure of the Milky Way Galaxy in which we live in increasing detail. We know that it is a disk galaxy, with two- or four- armed spirals, with a straight bar in the middle connecting the spirals...

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Surprise finding suggests ‘Water Worlds’ are more Common than we thought

view of one hemisphere of Europa, a moon made of pale rock with orange streaks across surface
A new study suggests that many more planets in distant solar systems have large amounts of water than previously thought—as much as half water and half rock. The catch? It’s probably imbedded underground, as in Jupiter’s moon Europa, above.
Image courtesy of NASA/JPL-Caltech/SETI Institute

Analysis finds evidence for many exoplanets made of water and rock around small stars. A new study suggests that many more planets may have large amounts of water than previously thought–as much as half water and half rock. The catch? All that water is probably embedded in the rock, rather than flowing as oceans or rivers on the surface.

Water is the one thing all life on Earth needs, and the cycle of rain to river to ocean to rain is an essential part of what keeps our planet’s climate stabl...

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Two New Temperate Rocky Worlds discovered

Artists illustration of the red star and two planets along with the SPECULOOS telescopes

An international research team including astronomers at the University of Birmingham, has just announced the discovery of two “super-Earth” planets orbiting LP 890-9, a small, cool star located about 100 light-years from Earth.

The star, also called TOI-4306 or SPECULOOS-2, is the second-coolest star found to host planets, after the famous TRAPPIST-1. This rare discovery is the subject of a forthcoming publication in the journal Astronomy & Astrophysics.

The system’s inner planet, called LP 890-9b, is about 30% larger than Earth and completes an orbit around the star in just 2.7 days. This first planet was initially identified as a possible planet candidate by NASA’s Transiting Exoplanet Survey Satellite (TESS), a space mission searching for exoplanets orbiting nearby stars...

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Planetary heist: Astronomers show Massive Stars can Steal Jupiter-sized Planets

Artist impression of a ringed planet

Jupiter-sized planets can be stolen or captured by massive stars in the densely populated stellar nurseries where most stars are born, a new study has found.

Researchers from the University of Sheffield have proposed a novel explanation for the recently discovered B-star Exoplanet Abundance STudy (BEAST) planets. These are Jupiter-like planets at large distances (hundreds of times the distance between the Earth and the Sun) from massive stars.

Until now their formation has been something of a mystery, as massive stars emit large amounts of ultraviolet radiation that stops planets from growing to the size of Jupiter – the largest planet in our solar system.

Dr Emma Daffern-Powell, Co-author of the study, from the University of Sheffield’s Department of Physicsand Astronomy add...

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