Happy birthday, Galileo! Born February 15, 1564

Galileo Galilei was 1 of the world's greatest astronomers. He was born on February 15, 1564. His discoveries changed the way we viewed our world.

Green comet photos and video: Editors’ picks

Enjoy these photos of Comet 2022 E3 (ZTF) as it departs the inner solar system. It was closest to Earth on February 1 and 2, 2023.

The science of kissing and why it’s good for you

Why does kissing feel good? Watch this video - the science of kissing - to learn why humans are drawn to puckering up and that it's good for you.

Why love really is a drug

On this Valentine's Day, watch a video about certain chemicals - including dopamine, oxytocin and vasopressin - making you feel good around someone you love.

Asteroid will pass Earth safely on February 15-16

A 1/2 mile wide (1 km wide) asteroid will pass Earth safely on February 15 and 16, 2023. Observers with telescopes can spot it. See star charts here.

It’s spoke season on Saturn!

Spoke season on Saturn comes in cycles centered on Saturn's equinoxes, which happen only about every 15 years. It's happening now!

Chuck Yeager – personification of the ‘right stuff’ – born 100 years ago

Chuck Yeager, a military test pilot, became the first to break the sound barrier on October 14, 1947. Afterwards, he was dubbed "the fastest man alive."

Saturn’s moon Mimas might have an ocean

A new study suggests that Saturn's moon Mimas may have a subsurface ocean. If so, the "Death Star" moon would join other ocean moons in the outer solar system.

See the moon near Antares on February 14 and 15

Find the waning crescent moon near Antares on the mornings of February 14 and 15, 2023. You may also spot the Crown of Scorpius nearby.

See the moon near Spica on February 11

Spot the moon near Spica, the brightest star of Virgo the Maiden, after midnight and in the morning of February 11, 2023. Read more.