Space
Watch the Progress 79 cargo launch October 27
On October 27, 2021, Russia’s uncrewed Progress 79 cargo craft will launch from the Baikonur Cosmodrome in Kazakhstan. Here’s how to watch.
Today's Image
Colors of Betelgeuse in a star collage
Soumyadeep Mukherjee captured the colors of Betelgeuse in 1,300 individual images that he compiled into a star-shaped collage.
Astronomy Essentials

Mercury before sunrise: start watching now

Look for Mercury before sunrise! Greatest elongation happens October 25. This is the Northern Hemisphere's best Mercury apparition of 2021.
Astronomy Essentials

Orionid meteor shower: All you need to know

In 2021, the Orionid meteor shower is expected to peak on the morning of October 21. But the just-past-full Hunter's Moon will interfere.
Astronomy Essentials

The full Hunter’s Moon is October 20

Find the date and time of the Northern Hemisphere's full Hunter's Moon for October 2021, and learn why this moon brightens the evening for a string of days.
Today's Image

Hunter’s Moon photos: Best of 2021

As autumn advances in the Northern Hemisphere, the Hunter's Moon illuminates the world for several nights around October 20. Hunter's Moon photos here.
Space

How high up are meteors when they begin to glow?

How high up are meteors when they begin to glow? Meteors begin to glow almost as soon as they hit Earth's atmosphere,.
Space

Earth in a tunnel? Decades-old mystery unfolds

A new astrophysical model connects local structures in our neighborhood of the Milky Way and depicts Earth in a tunnel in space.
Space

Solar system’s future seen: 1st planet around a white dwarf

Scientists got a peek at the solar system's future when they found a gas giant planet orbiting a white dwarf. One day the sun will die and become a white dwarf.
Space

Weird radio waves from the heart of the Milky Way

An international team of astronomers has detected weird radio waves coming from the heart of the Milky Way. They are unlike any found before, and may originate from a new type of cosmic object.