SUNSET: 
ASTRONOMY & OBSERVING NEWS
Dark Matter "Wake" in the Milky Way's Outer Reaches
Astronomers have discovered that a satellite of the Milky Way has left a "wake" in the dark matter halo that surrounds our galaxy.
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observing guides
Where to Look Tonight
This Week's Sky at a Glance, April 23 – May 1
This Week's Sky at a Glance, April 23 – May 1
Day by day, Venus and Mercury creep up from the sunset horizon in bright twilight. High above as twilight fades away, trace out the Arch of Spring arching high over Mars. Meanwhile Arcturus dominates the east.
where to lookApril: Follow the Moon
Sky Tour Podcast
To learn “what’s up” at night during April, download Sky Tour — an engaging narrated guide to the planets, stars, and constellations now visible.
Subscribe NowOur Community
Astronomers often spend their time lost among the stars, but the science of astronomy and the hobby of stargazing are also communal affairs. So, don’t be a stranger—find a group to get involved with today!
Editor's PICKS
Milky Way and Aurora over Lake Huron
Photographer: Adrian Bradley
M81/M82 and the Integrated Flux Nebula
Photographer: jason.dain
Photographer: Hermann Bimeshofer
Mars in 2020: 13 image retrospective
Photographer: Daniel Borcard
Photographer: KuriousGeorge
Photographer: George Tzellos
Comet C/2020 M3 ATLAS, IC 405 and IC 410
Photographer: Pepe Chambó
Photographer: senolsanli
Total solar eclipse in Patagonia, Argentina
Photographer: Eduardo Abello
Photographer: Dan-Engel
Mars on 2020-10-16 at 09:22 UT
Photographer: Rod Pommier
Photographer: Astrokn
Photographer: lubated
Photographer: Pepe Chambó
Comet NEOWISE over New York city
Photographer: worldtimezone
Comet NEOWISE viewed through noctilucent clouds
Photographer: David Harris
Comet C/2019 U6 Lemmon (2020,Jun.17)
Photographer: Pepe Chambó
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Issue Highlights
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Alien Comets
Eleni Petrakou
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Beyond Starlink: The Satellite Saga Continues
Anthony Mallama & Monica Young
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The Magellanic Giant
Nola Taylor Redd
