Want to Weigh a Star? Use an Alien Planet's Moon

It's always been a

The new

It only works if the

If all those

"I often get

To date, astronomers

By measuring the

How it works

Computer models

Step-by-step

By measuring how the

Finally, scientists

This research will

Gallery:

Join our Space Forums to keep talking space on the latest missions, night sky and more! And if you have a news tip, correction or comment, let us know at: community@space.com.

Space.com is the premier source of space exploration, innovation and astronomy news, chronicling (and celebrating) humanity's ongoing expansion across the final frontier. Originally founded in 1999, Space.com is, and always has been, the passion of writers and editors who are space fans and also trained journalists. Our current news team consists of Editor-in-Chief Tariq Malik; Editor Hanneke Weitering, Senior Space Writer Mike Wall; Senior Writer Meghan Bartels; Senior Writer Chelsea Gohd, Senior Writer Tereza Pultarova and Staff Writer Alexander Cox, focusing on e-commerce. Senior Producer Steve Spaleta oversees our space videos, with Diana Whitcroft as our Social Media Editor.

More about science astronomy

James Webb Space Telescope finds a wild black hole growth spurt in galaxies at 'cosmic noon'

Can Hubble still hang? How the space telescope compares to its successors after 35 years of cosmic adventures

Senators press Jared Isaacman, Trump's pick for NASA chief, on his ties to Elon Musk

See more latest

Get the Space.com Newsletter