Galaxies | Page 3 of 63 | Astronomy.com

Abell 370

Cosmology, Galaxies, Science

Dark Energy Explorers: How you can help unravel one of the universe’s biggest mysteries

At a distance of 12 million light-years and around 105,000 light-years across, NGC 253’s angular length is close to the diameter of the Full Moon.

Deep-Sky Objects

Observe the galaxies of Sculptor

Galaxies, Milky Way

The Milky Way and Andromeda may not merge, after all

Cosmology, Galaxies

Early galaxies may be smaller than initially thought

The author took this digital color image of the Andromeda Galaxy and its two main satellites with a 5-inch apochromatic refractor, Canon R mirrorless camera, and IDAS LPS 4 filter. The total exposure time was 18 minutes at ISO 4000.

Get to know the Andromeda Galaxy

Galaxies, Science

Event Horizon Telescope captures highest-resolution images ever taken from the ground

An artist's depiction of NEOWISE overlays the first asteroid image the mission took.

Robotic Spaceflight

NASA bids farewell to NEOWISE mission

NGC 2623 is a great example of what a pair of interacting galaxies looks like, 260 million light-years distant. Galaxies need mergers or other cosmic events to perturb different regions and trigger star formation and galaxy evolution.

Survivors from the Milky Way’s birth

The Andromeda Galaxy (M31) is the nearest major galaxy, and spans a width equivalent to more than six Full Moons.

Deep-Sky Objects

How to grasp the scale of the cosmos from your backyard

10 modern mysteries of the universe

Deep-Sky Objects

Tools for finding dark skies

NGC 4449

Galaxies, Science, Stars

Gemini North celebrates its 25th birthday with a glorious photo of NGC 4449