Arcturus is the brightest star north of the celestial equator. Near the handle of the Big Dipper, it's easy to find in spring in the Northern Hemisphere.
By studying Einstein rings, scientists have found that axions are more likely to be the form of dark matter than WIMPs. Learn more about the study here.
You can't miss dazzling Venus in the night sky. In fact, it's the 3rd brightest natural object in the sky, after the sun and moon. But why is Venus so bright?
Is the U.S. in a space race with China? While both are actively expanding their presence in space and their goals for the moon, one country is still far ahead.
A hybrid eclipse is a solar eclipse that appears as total for some and annular for others, with those farther from the centerline seeing a partial eclipse.
Members of the EarthSky community - including scientists, as well as science and nature writers from across the globe - weigh in on what's important to them.