Early risers have a great view of a lunar feature normally located near the limb this morning. An hour before sunrise, the Moon is roughly 20° above the eastern horizon. About 25 percent of its ...

A crescent Moon guides the way to the Red Planet as galaxies glow and Venus stands between the horns of the Bull in the sky ...

Now 15th magnitude, the comet is well-positioned for observation late overnight and into the early-morning hours.

M94, also called the Croc’s Eye Galaxy, glows high in the sky tonight. How much detail can your scope pick out?

Main-belt world Egeria is drifting near the star 80 Virginis tonight — the asteroid’s motion will be readily observable.

New analysis of ALMA observations of interstellar comet 3I/ATLAS show its water carries a chemical signature pointing to a colder, more distant origin than any comet ever measured.

We cannot measure the slowing of time near the Big Bang because there is no “cosmic clock” outside of this event against ...

After the end of World War II, the U.S. military searched for a location for a new long-range missile testing facility, having found the existing White Sands Proving Grounds in New Mexico to be too ...

Without our satellite, Earth’s geology, biology, and climate — even human philosophy — would be vastly different.