Sky Digest
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Tonight at a Glance
Bright moon tonight — best deep-sky viewing before moonrise (01:19)
Planet Highlights
Comets
For Beginners (naked eye)
Binocular Targets
Small Scopes (3–6 inch)
Big Scopes (8–12 inch)
The Week Ahead
| Sun | Mon | Tue | Wed | Thu | Fri | Sat |
| 🌖 57% | 🌗 47% | 🌗 38% | 🌗 29% | 🌘 21% | 🌘 13% | 🌘 7% |
| — | — | — | — | — | — | — |
NASA Astronomy Picture of the Day
Active Sunspot Region 4366 Crosses the Sun
An unusually active sunspot region is now crossing the Sun. The region, labelled AR 4366, is much larger than the Earth and has produced several powerful solar flares over the past ten days. In the featured image, the region is marked by large and dark sunspots toward the upper right of the Sun's disk. The image captured the Sun over a hill in Zacatecas, Mexico, 5 days ago. AR 4366 has become a candidate for the most active solar region in this entire 11-year solar cycle. Active solar regions are frequently associated with increased auroral activity on the Earth. Now reaching the edge, AR 4366 will begin facing away from the Earth during the coming week. It is not known, though, if the active region will survive long enough to reappear in about two weeks' time, as the Sun rotates.
Image credit: Daniel Korona — APOD is a service of NASA and Michigan Tech. U.
View on NASA APODSpace News
NASA's Artemis II crewed test flight around the Moon is targeting launch no earlier than April 1, 2026, marking humanity's return to lunar exploration for the first time in over 50 years.
NASA — 25 Mar 2026
NASA's James Webb and Hubble Space Telescopes have combined observations to provide the most comprehensive infrared and optical view of Saturn to date, revealing new insights into the planet's rings and atmosphere.
NASA — 25 Mar 2026
ESA astronaut Sophie Adenot is currently aboard the ISS during a busy period with multiple cargo vehicle departures scheduled within three weeks, highlighting active station resupply operations.
ESA — 20 Mar 2026
Understand Your Telescope
See the light path through six telescope designs: refractor, Newtonian, SCT, Maksutov, RC, and Gregorian. Adjust aperture, focal length, and eyepiece to calculate magnification and field of view.
Open Optics Simulator
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