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A bright Geminid fireball lights up the sky above Organ Pipe Cactus National Monument, Arizona

How to see the best annual meteor showers: Dates, names, tips for best viewing

A color image of Pluto shows its heart-shaped section.

Science, Solar System

Is Pluto a planet? It depends.

Around a star in our Milky Way galaxy, astronomers have discovered an extremely low-density planet that is as light as cotton candy. The new planet, named WASP-193b, appears to dwarf Jupiter in size, yet it is a fraction of its density. Credit: K. Ivanov/MIT.

Exoplanets, Science

‘This planet should not be there.’ Second lightest exoplanet known to date surprises astronomers

Venus, the star Regulus, the Moon, Mars, and Mercury seen over the Badlands in South Dakota on Sept. 18, 2017. Credit: Gregg Alliss.

Astronomy for beginners, Science, Solar System

What it means for planets to align

Noctilucent clouds, or NLC, appear in the sky during the summer months in stunning displays. Credit: Stuart Atkinson

Observing, Upcoming Events

How to see noctilucent clouds, a dazzling sight in summer skies

This breathtaking image features Messier 78 (the central and brightest region), a vibrant nursery of star formation enveloped in a shroud of interstellar dust. Credit: ESA.

Cosmology, Robotic Spaceflight, Science

Euclid’s new portraits of the dark universe are filled with detail, and wonder

Starmus kicked off a spectacular concert event open to the public in Bratislava, which attracted some 25,000 to 30,000 people who flocked to the site. The brilliant electronic musician Jean-Michel Jarre took to the stage, aided by lasers and fireworks, and hosted special guest Brian May of Queen. Credit: David J. Eicher.

Starmus VII hit all the right notes from beginning to end

The oldest stars in the universe were swallowed by the Milky Way

An artistic conception of Gliese 12 b, shows the exoplanet in the foreground at right while the red dwarf star glows brightly in the distance at left.

Exoplanets, Science

Astronomers discover Gliese 12 b, a potentially habitable exoplanet

Objects like Arrokoth could preserve ‘primitive ices’ from the birth of our solar system

This image from 2013 shows the bright light of a solar flare on the left side of the sun and an eruption of solar material shooting through the sun’s atmosphere, called a prominence eruption. Credit: NASA/Goddard/SDO.

The Sun’s magnetic field is generated surprisingly close to its surface, new study suggests

This is an artistic impression of record-breaking quasar J059-4351. It's the bright core of a distant galaxy that is powered by a supermassive black hole like the one studied in this new research. Credit: ESO/M. Kornmesser

Exotic Objects, Science

In a cosmic breakthrough, astronomers measure a supermassive black hole’s spin