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Astronomy Picture Of the Day (APOD)
APOD: 2026 April 21 Б Three Sky Arches over Snowy Alps
21.04.2026
Why are there three arches across the sky instead of two? Last month, after being dropped off by a helicopter at a high mountain peak in the Alps near the Swiss Italian border, an adventurous astrophotographer expected two arches of our Milky Way galaxy to be visible during the night.
APOD: 2026 April 20 Б Comet R3 PanSTARRS over a Himalayan Valley
20.04.2026
The best way to see comet R3 PanSTARRSБs long tail is with a camera. This week, the recently brightened comet appears in northern skies to the east just before dawn, but is only barely visible to the unaided eye.
APOD: 2026 April 19 Б Eye on the Milky Way
19.04.2026
Have you ever had stars in your eyes? It appears that the eye on the left does, and moreover, it appears to be gazing at even more stars. The featured 27-frame mosaic was taken in 2019 from Ojas de Salar in the Atacama Desert of Chile.
APOD: 2026 April 18 Б PanSTARRS and Planets
18.04.2026
Near the eastern horizon before sunrise, Comet C/2025 R3 PanSTARRS is getting brighter. Readily visible in binoculars and small telescopes, the comet may be just on the verge of naked-eye visibility from dark sky sites.
APOD: 2026 April 17 Б M82: Starburst Galaxy with a Superwind
17.04.2026
Messier 82 is a starburst galaxy with a superwind. In fact, through supernova explosions and powerful winds from massive stars, the burst of star formation in M82 is driving a prodigious outflow. Evidence for the superwind from the galaxy's central regions is clear in the sharp telescopic portrait.
APOD: 2026 April 16 Б South Celestial Tree
16.04.2026
If you live in the northern hemisphere, you may have learned how to locate the North Star, Polaris, in the night sky. It can be used to find north, and it approximately marks the northern celestial pole.
APOD: 2026 April 15 Б The ISS Transits the Moon
15.04.2026
Nope, that is not an alien spaceship landing on the Moon! This is an image of the International Space Station (ISS) as it begins to transit in front of the Moon. The ISS is in low-Earth orbit (LEO) where it wizzes around the Earth every 90 minutes.
APOD: 2026 April 14 Б The Long Wispy Tail of Comet R3 (PanSTARRS)
14.04.2026
Why does Comet R3 (PanSTARRS) have a wispy tail? The newest bright member of the inner Solar System, Comet C/2025 R3 (PanSTARRS) is already extending an impressive stream of glowing gas. This tail starts from an unseen central nucleus of dirty ice that is likely a few kilometers across.
APOD: 2026 April 13 Б NGC 602 and Beyond
13.04.2026
The clouds may look like an oyster, and the stars like pearls, but look beyond. Near the outskirts of the Small Magellanic Cloud, a satellite galaxy some 200 thousand light-years distant, lies 5 million year young star cluster NGC 602.
APOD: 2026 April 12 Б Comet R3 PanSTARRS Brightens
12.04.2026
Comet R3 is brightening rapidly -- will it survive? C/2025 R3 (PanSTARRS) has been slowly brightening and extending an ion tail since its discovery last year. This shedding mountain of dirty ice puts...
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