Astronomers have confirmed that strong magnetic fields are frozen in place deep inside aging stars.
Does a massive, extremely distant planet orbit the Sun? A new analysis of distant solar-system orbits argues that it should exist.
A new technique lets astronomers measure nearly invisible clouds of hydrogen gas from across the universe.
The most luminous supernova ever discovered, ASASSN-15lh, challenges a popular theory for blazingly bright exploding stars.
The Moon grows to full on Saturday, passing through Gemini in the late evening hours. Plus, find the Winter Hexagon in the east and south.
Over the next two weeks, for the first time in more than a decade, you can see all of the naked-eye planets — from Mercury to Saturn — together in the predawn sky.
Solar eclipses take center stage this year, with a total event on March 9th (visible from Indonesia) and an annular (central Africa) on September 1st.
Download our monthly stargazing podcast to learn about a close pairing of Venus and Saturn before dawn, a strong meteor shower, and a parade of bright stars after sunset.