Radio astronomy opens a window onto the invisible universe. While our eyes can detect visible light, countless objects in space emit radiation at much longer wavelengths, in the radio portion of the ...

In April 2019, scientists released the first image of a black hole in the galaxy M87 using the Event Horizon Telescope (EHT). However, that remarkable achievement was just the beginning of the science ...

In this field, the Atacama Large Millimeter/Submillimeter Array (ALMA) in Chile stands out as one of the world’s most ...

After a string of dramatic failures, the huge Starship rocket from SpaceX had a fully successful test on Oct. 13, 2025. A couple more test ...

The Chandra X-ray Observatory has just celebrated its 25th birthday—not bad for a telescope that was only supposed to last five years. However, NASA's current plans call for retiring this unique ...

All telescopes perform basically the same function. They gather as much light as possible from a faint astronomical object, and focus the light onto a detector. Historically, the gathering of light ...