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

Today in the history of astronomy, the facility that eventually will become the Cape Canaveral Spaceport and Kennedy Space ...

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

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?

Venus and Jupiter are the top evening features for your observing run after sunset in May. Jupiter also hosts a handful of exciting double transits — and double shadow transits — involving Europa and ...

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 ...

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.

Stars twinkle and sometimes appear to move around due to our atmosphere “scrambling” their light as it travels to our eyes.

NASA has awarded a contract to execute a high-stakes orbital maneuver, racing against time and atmospheric drag to prevent a critical science asset from tumbling back to Earth. The target of this ...

Although the Moon is bright, step outside early this morning to see if you can spot some fast-moving meteors left behind by ...

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