Heat from radioactivity, not starlight, could warm planets enough to allow liquid water to exist on their surfaces. ДМИТРИЙ ЛАРИЧЕВ/ISTOCK.COM Not too close, but not too far. That’s long been the rule describing how distant a planet should be from its star in order to sustain life. But a new […]

This artist’s impression depicts a star being torn apart by an intermediate-mass black hole (IMBH), surrounded by an accretion disc. This thin, rotating disc of material consists of the leftovers of a star that was ripped apart by the tidal forces of the black hole. Credit: ESA/Hubble, M. Kornmesser New […]

A colorful view of Mercury produced from images taken by the MESSENGER spacecraft (Image: © NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington) It’s possible that Mercury once held the ingredients for life. In 1974, NASA’s Mariner 10 probe flew by Mercury and observed a cracked, cratered landscape. Now, according to […]

New simulation-based study on sleeping cataclysmic binaries supports contested 35-year-old predictions, shows that observable novae are just “tip of the iceberg.” Almost 35 years ago, scientists made the then-radical proposal that colossal hydrogen bombs called novae go through a very long-term life cycle after erupting, fading to obscurity for hundreds […]

According to classical theories, these space giants would not have had the time to develop in the young Universe. Yet, observations say they were already present. A new study by SISSA proposes a response to the fascinating question. Credit: NASA/JPL-Caltech These space giants would not have had the time to […]

This computer simulation of a supernova shows how matter is ejected from the heart of an exploding star. Credit: © 2020 RIKEN Astrophysical Big Bang Laboratory Simulations suggest that two stars came together to form a blue supergiant, which subsequently exploded. A supernova in a nearby galaxy may have originated […]