Astronomy Picture of the Day: Shells of Stars in Elliptical Galaxy PGC 42871

How do galaxies grow? To help find out, the Hubble Space Telescope was deployed to image the unusual elliptical galaxy PGC 42871.

Astronomy Picture of the Day: Ultraviolet Earth from an Observatory on the Moon

Which planet is this? Earth. The featured false color picture shows how the Earth shines in ultraviolet (UV) light.

Astronomy Picture of the Day: Airglow Borealis

The best known asterism in northern skies hangs over the Canadian Rockies in this mountain and night skyscape taken last week from Banff National Park.

Astronomy Picture of the Day: IC 59 and IC 63 in Cassiopeia

These bright rims and flowing shapes look ghostly on a cosmic scale.

Astronomy Picture of the Day: Barnard 150: Seahorse in Cepheus

Light-years across, this suggestive shape known as the Seahorse Nebula appears in silhouette against a rich, luminous background of stars.

Astronomy Picture of the Day: Light Pillars over Whitefish Bay

What's happening in the sky? Unusual lights appeared last week to hover above Whitefish Bay on the eastern edge of Lake Superior between the USA and Canada.

Astronomy Picture of the Day: Apollo 12 Visits Surveyor 3

Apollo 12 was the second mission to land humans on the Moon.

Astronomy Picture of the Day: Meteor, Comet, and Seagull (Nebula)

A meteor, a comet, and a photogenic nebula have all been captured in this single image.

Astronomy Picture of the Day: Halo of the Cat's Eye

Not a Falcon 9 rocket launch after sunset, the Cat's Eye Nebula (NGC 6543) is one of the best known planetary nebulae in the sky.

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