Galaxy

Our home galaxy, the Milky Way, did not always have its iconic spiral shape. Rather, it acquired its shape through a process called “galactic speciation.”

Dark matter, seemingly invisible, is thought to make up a vast majority of all matter in the universe. A massive galaxy having none would challenge everything we know about the universe.

Gravitational lensing has the practical effect of a magnifying glass, microscope, or binoculars, and enables scientists to observe celestial bodies that would otherwise be too distant to discern.

Scienets have observed a white dwarf star, named for the two-faced ancient Roman god, that appears to have two sides with completely different compositions.

Astrophysicists have tried to calculate how long the universe has existed by measuring time elapsed since the Big Bang and evaluating the oldest stars at high redshifts of light from other galaxies.

The Perseverance landed at the Jezero crater in 2021, an area in the planet's northern hemisphere that once was flooded with water and home to an ancient lake basin.

Researchers said the gamma-ray burst they observed may have been caused by the collision of two compact stars in the densely packed and chaotic environment.

The organic molecules found in this distant galaxy are not signs of life. Found via NASA's James Webb Space Telescope, their discovery raises questions about star formation.

A new theoretical model made by Israeli astrophysicists reveals an excess of massive galaxies, in contrast to previously accepted theories.

Humanity has been looking for aliens for decades but has yet to find any evidence. A new study suggests we may just be in a sort of cosmic blind spot for alien radio signals.