Using 16 years of data from NASA’s gamma-ray detecting Fermi spacecraft, astronomers have discovered that “microquasars,” systems in which a black hole is slowly devouring a star, may be small, but they pack one heck of a punch. Despite their diminutive nature, this research suggests even microquasars snacking on small stars can have an impressive … Read more
Dark energy, the mysterious force that’s driving the accelerating expansion of the universe, may not actually exist, scientists say. Their research has brought into question one of the cornerstones of modern cosmology. In a new study, published Dec. 19, 2024 in the journal Monthly Notices of the Royal Astronomical Society, the researchers analyzed data from … Read more
How do you cool down a phoenix? I don’t mean the mythological birds of flame and rebirth, but rather a cosmic namesake with a fittingly fiery nature. Using the James Webb Space Telescope (JWST), astronomers may finally have the answer. They used the powerful instrument to investigate the extreme cooling of gas in the Phoenix … Read more
Credit: Vitalij Kopa/Dreamstime.com There are thousands upon thousands of questions related to the topic of astronomy, from the basics of the science to the complexities of the distant cosmos. Here are just 40 such questions that we as astronomers — professional and amateur — hear. I hope their answers help you explain some of these … Read more
Scientists have discovered a new way to probe the interiors of neutron stars by using gravitational waves to turn them into “cosmic tuning forks.” The reverberations of such ripples in spacetime could reveal the interiors of these extreme stellar remains. Born when massive stars die, neutron stars have up to two times the mass of … Read more
Superman isn’t the only one with X-ray vision. Plenty of exploding stars are also adept at blasting outbursts of this high-energy light. Now, thanks to a chance discovery, scientists are aware of an entirely new explosive stellar source of X-ray radiation. These outbursts’ light output didn’t resemble any previous cosmic explosion. Meet the “millinovas,” a … Read more
On Mars, some of the most likely places to look for traces of ancient life may also be the least likely to preserve those traces. This is the result of a recent study that simulated exposing important building blocks of life called “lipids” to cosmic rays pummeling the surface of Mars. And, in short, the … Read more
New observations from the James Webb Space Telescope (JWST) have corroborated data from its predecessor, the Hubble Space Telescope, to determine something is missing from our recipe of the cosmos. The JWST conducted its largest survey yet of the accelerating expansion of the cosmos as scientists attempt to discover why the universe is expanding faster … Read more