Space News & Blog Articles

It's a well-known fact that Supermassive Black Holes (SMBH) play a vital role in the evolution of galaxies. Their powerful gravity and the way it accelerates matter in its vicinity causes so much radiation to be released from the core region - aka. an Active Galactic Nucleus (AGN) - that it will periodically outshine all the stars in the disk combined. In addition, some SMBHs accelerate infalling dust and gas into jets that emanate from the poles, sending streams of super-heated material millions of light-years at close to the speed of light.

Warmer oceans are not good. Shallow, glib commentators might try to laugh it off, but their laughter reveals an infantile lack of seriousness in their thinking. Earth is one big, life-supporting system, and we know from the geological record that when the system falters, life pays the price.

Supernovae play a central role in the birth of new stars. They provide a rich source of gas and dust to form stellar nurseries, and their explosions can trigger shockwaves that trigger the birth of new stars. But it all depends on where supernovae occur. A supernova that happens within a dense cloud of gas will have a very different effect than one that occurs in a large void. Understanding these effects is a challenge. It is much easier to observe a supernova while it happens rather than long before or after. But a new radio study of the Andromeda Galaxy explores these interactions.

Stars are known for their stellar winds, streams of gas and charged particles from their upper atmospheres that collide with the interstellar medium. These winds can create bow shocks in the surrounding gas. But astronomers were surprised to find a bow shock near a white dwarf star, which are sometimes called dead stars or zombie stars.

All across the Universe, black holes devour stars that stray too close. Often it's a supermassive black hole that tears a star apart in what's known as a tidal disruption event. But sometimes, it's a stellar mass black hole, and its victim is its binary star partner.

The Vera C. Rubin Observatory has discovered the fastest-spinning asteroid ever over 500 meters in size.

Combining data from different telescopes is one of the best ways to get a fuller picture of far-off objects. Because telescopes such as Hubble (visible light), the James Webb Space Telescope (infrared), and the Atacama Large Millimeter Array (radio) each collect data in different wavelengths, they are able to capture distinct features of objects like galaxies that other telescopes cannot observe. A new paper by a large group of authors, headed by Andreas Faisst of Caltech, presented at the American Astronomical Society Meeting last week and published in The Astrophysical Journal Supplement tracks eighteen early galaxies in as broad of a spectrum as those instruments can collect, and most significantly found that they seem to “grow up” faster than expected.