Astronomy

Latest about Astronomy

What is the moon phase today? Lunar phases 2025

By Tariq Malik, Daisy Dobrijevic last updated

Reference See what moon phase it is tonight and find out when you can see the rest of the moon phases for 2025.

Reference
A black and white crossword puzzle sits underneath a blue and white coffee cup with the Space.com black and white logo in the bottom left corner.

Space.com headlines crossword quiz for week of Dec. 1, 2025: What is the name of December's supermoon?

By Kenna Hughes-Castleberry published

Test your space smarts with our weekly crossword challenge, crafted from Space.com's biggest headlines.

Astronomy
A streak of white light is seen amidst a starry golden deep space image

NASA spacecraft tracks comet SWAN in incredible 40-day timelapse — and even glimpses interstellar invader 3I/ATLAS (video)

By Sharmila Kuthunur published

NASA imaged Comet C/2025 R2 (SWAN) every four minutes for nearly 40 days, marking the longest any comet has been tracked with such frequency.

Comets
A series of small purple images with golden light in the shape of various disks

Scientists capture 51 images showing exoplanets coming together around other stars: 'This data set is an astronomical treasure'

By Samantha Mathewson published

The Very Large Telescope's SPHERE instrument captured unprecedented images of 51 dusty rings shaping young planetary systems.

Stars
A photo of the surface of Mars from space, with a large crater seen in its reddish brownish surface

Mars orbiter sees 'butterfly' crater spread its wings on the Red Planet

By Kenna Hughes-Castleberry published

A new view of Mars showcases a dramatic impact crater on the Red Planet with its debris wings unfurling across the surface like a butterfly in flight.

Mars
A dark circular eye peers out of a lighter landscape of the Saharan Desert

Seeing a bull's-eye in the desert | Space photo of the day for Dec. 5, 2025

By Kenna Hughes-Castleberry published

Is this really a crater in the Saharan Desert?

Earth
A photograph of an ancient Chinese text with vertical characters with a column circled in red

Ancient Chinese texts reveal new clues about the 1st recorded solar eclipse

By Julian Dossett published

What can today's scientists learn about astronomical phenomena from ancient texts?

The Sun
A glowing cloud of red gas and dust mixed in with bright dots for stars in deep space

Glowing bridge links dwarf galaxies in stunning new image from the James Webb Space Telescope

By Samantha Mathewson published

This infrared view offers the clearest look yet at how dwarf galaxies merge, evolve, trade gas and ignite waves of new stars.

James Webb Space Telescope
(Main) The CMB as seen by ACT with polarization represented by small black arrows. (Inset) The ACT instrument located in the Atacama desert of Chile

'Hubble tension' is back again as a new cosmic map deepens the puzzle

By Robert Lea published

"It means cleaning house, narrowing the viable paths forward, and no longer spending energy on what are evidently dead ends."

Astronomy
A series of rainbow colored strings on the left, labeled Cosmic web, next to a diagonally placed cylinder with bits of colored shapes inside with a boxout on the right with various boxes of rainbow shapes

Scientists discover one of our universe's largest spinning structures — a 50-million-light-year-long cosmic thread

By Keith Cooper published

The discovery potentially transforms what we think about how the cosmic environment influences galaxies as they form.

Astronomy
1 2 3 4 5 6 7 8 9 Archives