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Astronomy Picture Of the Day (APOD)
APOD: 2025 September 21 Б Equinox Sunset
20.09.2025
Does the Sun set in the same direction every day? No, the direction of sunset depends on the time of the year. Although the Sun always sets approximately toward the west, on an equinox like today the Sun sets directly toward the west.
APOD: 2025 September 20 Б Gibbous vs Crescent
19.09.2025
Early risers around planet Earth have enjoyed a shining crescent Moon near brilliant Venus, close to the eastern horizon in recent morning twilight skies. And yesterday, on September 19, skygazers watching from some locations...
APOD: 2025 September 19 Б The NGC 6914 Complex
18.09.2025
A study in contrasts, this colorful cosmic skyscape features stars, dust, and glowing gas in the vicinity of NGC 6914. The interstellar complex of nebulae lies some 6,000 light-years away, toward the high-flying northern constellation Cygnus and the plane of our Milky Way Galaxy.
APOD: 2025 September 18 Б Comet C/2025 R2 SWAN
17.09.2025
A new visitor from the outer Solar System, comet C/2025 R2 (SWAN) also known as SWAN25B was only discovered late last week, on September 11. That's just day before the comet reached perihelion, its closest approach to the Sun.
APOD: 2025 September 17 Б Nebulas and Clusters in Sagittarius
16.09.2025
Can you spot famous celestial objects in this image? 18th-century astronomer Charles Messier cataloged only two of them: the bright Lagoon Nebula (M8) at the bottom, and the colorful Trifid Nebula (M20) at the upper right.
APOD: 2025 September 16 Б New Comet SWAN25B over Mexico
15.09.2025
A newly discovered comet is already visible with binoculars. The comet, C/2025 R2 (SWAN) and nicknamed SWAN25B, is brightening significantly as it emerges from the Sun's direction and might soon become visible on your smartphone -- if not your eyes.
APOD: 2025 September 14 Б Planets of the Solar System: Tilts and Spins
13.09.2025
How does your favorite planet spin? Does it spin rapidly around a nearly vertical axis, or horizontally, or backwards? The featured video animates NASA images of all eight planets in our Solar System to show them spinning side-by-side for an easy comparison.
APOD: 2025 September 13 Б Star Trails over One Mile Radio Telescope
12.09.2025
The steerable 60 foot diameter dish antenna of the One-Mile Telescope at Mullard Radio Astronomy Observatory, Cambridge, UK, is pointing skyward in this evocative night-skyscape. To capture the dramatic scene, consecutive 30 second exposures were recorded over a period of 90 minutes.
APOD: 2025 September 12 Б Lunar Eclipse in Two Hemispheres
11.09.2025
September's total lunar eclipse is tracked across night skies from both the northern and southern hemispheres of planet Earth in these two dramatic timelapse series. In the northern hemisphere sequence (top panel) the MoonБs trail arcs from the upper left to the lower right.
APOD: 2025 September 11 Б The Umbra of Earth
10.09.2025
The dark, inner shadow of planet Earth is called the umbra. Shaped like a cone extending into space, it has a circular cross section most easily seen during a lunar eclipse.
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