Astronomy

An artistic rendering of the newly discovered LP 791-18 d exoplanet

Newly Discovered Exoplanet May Be Covered in Volcanoes

Astronomers found an Earth-sized world that could have liquid water on its surface and may be able to support life

Illustration of a black hole pulling in surrounding gas.

Astronomers Identify the Largest-Ever Cosmic Explosion

The burst is ten times brighter than any known exploding star and has lasted for more than three years

Saturn's rings and five of its moons, as captured by the Cassini spacecraft in 2011. The five moons, from left to right, are Janus, Pandora, Enceladus, Mimas and Rhea.

Saturn May Have Just Won the 'Moon Race' With 62 More Discovered

It will likely reign supreme as our solar system's planet with the most moons from now on, astronomers say

An artist's impression of a doomed planet skimming the surface of its star.

In a First, Scientists Witness a Dying Star Swallowing a Planet

Astronomers believe the doomed world was a gas giant about the size of Jupiter

Aurora borealis captured in northern Minnesota on April 23.

Widespread Auroras That Lit Skies This Week Are Getting More Common

The stunning colors that dazzled viewers on Sunday will appear again as the sun's activity builds to a peak in 2025

The new image of the black hole in the Messier 87 galaxy.

See the Sharp New Image of a Supermassive Black Hole

Astronomers used machine-learning technology to improve a 2019 visualization of the M87 black hole, located some 54 million light-years away from Earth

It is expected that about 18 meteors per hour will light up the sky at the peak of the Lyrid meteor shower this year.

How to Watch the Spectacular Lyrid Meteor Shower

One of the oldest recorded annual showers, the Lyrids will peak on April 22

One-third of the world’s population can’t see the starry band of light in the night sky that makes up the Milky Way (above). The new show “Lights Out: Recovering Our Night Sky” at the National Museum of Natural History looks at the devastating impacts of artificial light.

Planet Positive

Why It’s Time for a Worldwide Lights-Out Program

A new Smithsonian exhibition delves into the issue of light pollution, with easy solutions offering an immediate change

The supernova Cassiopeia A, as imaged by the James Webb Space Telescope's Mid-Infrared Instrument (MIRI)

See the James Webb Telescope's Stunning New Snapshot of an Exploded Star

The supernova, known as Cassiopeia A, is located roughly 11,000 light-years from Earth and could offer insights into cosmic dust and star death

An artist's rendition of the runaway black hole with the stream of stars trailing behind it. Its former host galaxy is in the upper right of the image.

Black Hole Hurtling Through Space Leaves a Trail of Stars in Its Wake

Researchers theorize a stream of stars 200,000 light-years long came from a black hole ejected from its galaxy

The total solar eclipse of 2017 as seen from Monmouth, Oregon

Everything You Need to Know About the 2024 Total Solar Eclipse

A veteran eclipse chaser explains how to get ready for one of the planet’s biggest celestial events

A depiction of the Scorpio zodiac sign at the Temple of Esna in Egypt

See Colorful Paintings of the Zodiac Signs From an Ancient Egyptian Temple

Newly restored, the Ptolemaic era reliefs were previously covered by a layer of dirt and soot

Skywatchers can see five planets this week.

How to Watch Five Planets Align in the Night Sky This Week

Mercury, Venus, Mars, Jupiter and Uranus will appear as if in a parade in the Western sky on Tuesday

This computer-generated image shows objects in Earth's orbit. The majority—around 95 percent—are bits of space junk.

Burning Space Junk Creates Mysterious Lights in California Sky

Bright streaks observed Friday were jettisoned equipment from the International Space Station re-entering Earth’s atmosphere

This composite image of the WR 124 star combines observations from Webb's Near-Infrared Camera (NIRCam) and Mid-Infrared Instrument (MIRI).

See the James Webb Telescope's Rare New Image of a Dying Star

The star is on the cusp of exploding in a supernova and may offer insights into the universe's so-called "dust budget crisis"

Astronomers and musicians have developed “sonifications” to bring the symphony of the cosmos to a wider audience.

What Does the Universe Sound Like?

The Smithsonian Astrophysical Observatory and other researchers have melded astronomy and music to offer a new oeuvre

A Dark Sky Sanctuary must have exceptionally starry nights.

This Tiny Welsh Island Is Europe's First Dark Sky Sanctuary

Ynys Enlli joins just 16 other sites of its kind across the world

Images of the six objects thought to be massive galaxies from the early universe

Webb Telescope Finds Evidence of Massive Galaxies That Defy Theories of the Early Universe

The six “universe breakers” appear much larger than what scientists thought was possible at that time

How much advance warning would we have if a large comet were headed on a collision course with Earth?

How Much Warning Would We Have of an Earth-Shattering Comet? And More Questions From Our Readers

You’ve got questions. We’ve got experts

An enhanced-contrast image of Jupiter and its moon Ganymede taken by NASA's Cassini spacecraft in 2000.

Jupiter Reclaims Title of Planet With the Most Moons

After the discovery of 12 new moons, the gas giant now has 92 known natural satellites—and scientists expect to find more

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