Site of collision of 4 galaxy clusters

Here's galaxy cluster MACS J0717, the site of a collision between 4 galaxy clusters, located about 5.4 billion light years away from Earth.

Galaxies

The Milky Way - plus 2 large nearby galaxies in our own Local Group, in the directions to the constellations Andromeda and Triangulum.

Iridescent Kelvin Helmholtz clouds

These clouds look like breaking ocean waves. It's rare to see them iridescent!

Northern lights reflections, in Maine

A meteor streaks overhead ... an aurora reflects in a pond.

What eclipse-watching looks like

Eclipse fans have gone to the various islands in Indonesia - in the Pacific - to watch the March 8-9, 2016 total eclipse of the sun.

Catching Venus

The very bright planet Venus is low in the east before dawn now, but you can catch it, if you look.

Jupiter and its 4 largest moons

Earth will soon pass between Jupiter and the sun, so the best time of year to see this giant planet is upon us.

Moon halo, planets, star

Stephen Marceau in Eastern Australia captured two planets and a star inside a lunar halo this week. Beautiful!

Fair weather flights over Zimbabwe

Setting sun with glimpses of fair weather flight in front of it, including circling swallows and a light airplane.

Moonrise over Arctic Ocean

A psychedelic moon rising over the Arctic Ocean, created by a strong temperature inversion.

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