In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small ...

We're now just past the midpoint of astronomical winter — that moment marking the midway point between December's winter solstice and March's vernal equinox. That moment took place at 4:11 p.m.

The area near clouds is often classified as ‘clear sky’, but a new study demonstrates the potential biases of misclassifying ...

Over the next several weeks, astronomers will be looking closely at an asteroid called 2024 YR4 that could be as big as a ...

February's night sky offers a treat for stargazers, with the Winter Triangle and a temporary Mars Triangle shining bright, ...

A brilliant comet waved its tail above the site of the world's largest telescope as it lit up the night sky last month ... home to the Very Large Telescope and future site of the Extremely ...

Mars and Earth will also align in their orbits, and this will occur around the time when Mars is at its closets to Earth, so it will appear bigger and brighter in the night sky. This is called an ...