Mars passed behind the sun from Earth yesterday, November 18, 2023. Between now and early December, data exchange between Earth and Mars spacecraft is limited.
The universe is expanding faster than theory predicts. Scientists are trying to come up with new models to explain what the standard model of cosmology can't.
NASA has discovered a supermassive black hole that is at an early stage of growth in the early universe. Its mass is about the same as its host galaxy's.
International Observe the Moon Night is October 21, 2023. It's a global event for celebrating the moon. Here's how you can participate online or in person.
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.