The rare comet 3I/ATLAS, an interstellar visitor, is set to make its closest approach to Earth on December 19. This article provides tips on how to observe this cosmic spectacle.

New measurements using gravitational lensing suggest the universe’s current expansion rate does not agree with signals from the early cosmos.

The Hubble Space Telescope has captured imagery of the most distant single star found yet. It took the light from the star 12.9 billion light years to reach Earth. Learn how it was discovered. Credit; ...

If you feel a thrill every time we discover something new about the cosmos, then November 25th may have been a noteworthy day ...

Gamma-ray bursts (GRB) are some of the most perplexing phenomena in nature. Even though astronomers have detected about ...

Comet C/2025 R2 (SWAN)'s backdrop is dominated by the Eagle Nebula — a vast cosmic structure of dust and hydrogen-rich gas ...

The comet is the third object ever confirmed to have entered our cosmic neighborhood from elsewhere in the galaxy. Space ...

Current physics is speeding toward a breaking point, as astronomers confirm that the Hubble tension in new data.

Neil deGrasse Tyson gave a rousing defense of scientific principles in his characteristic brash way during his Purdue ...

Most scientists agree the prolonged flash likely occurred when a black hole ate a star, but two other ideas can't be ruled ...

A seven-hour gamma-ray burst, GRB 250702B, stuns astronomers and hints at powerful new cosmic engines still unknown to science.

In a new study published in The Astrophysical Journal, a group of researchers from the University of Colorado Boulder ...