Comet and Meteor
5.01.2009

This meteor streaking toward the horizon through the early morning sky of January 3rd is from the annual Quadrantid meteor shower. Aligned with the shower's radiant point high in the north (off the top of the view), the meteor trail passes to the right of bright bluish star Beta Scorpii.

Discovery s Cloud
8.04.2010

The space shuttle orbiter Discovery is now docked with the International Space Station, some 350 kilometers above planet Earth. Last Monday, its launch to orbit was a beautiful one as it rose into clear, predawn skies at 6:21am EDT from Kennedy Space Center's pad 39A.

Leonids Over Monument Valley
19.11.2012

What's happening in the sky over Monument Valley? A meteor shower. Over the past weekend the Leonid meteor shower has been peaking. The image -- actually a composite of six exposures of about 30 seconds each -- was taken in 2001, a year when there was a much more active Leonids shower.

Hurricane Harvey Strengthens
26.08.2017

A large and dangerous hurricane has developed in the Gulf of Mexico. The featured time-lapse video shows Hurricane Harvey growing to Category 4 strength over the past few days, as captured by NASA and NOAA's GOES-East satellite.

Rocket Plume Shadow Points to the Moon
24.06.2018

Why would the shadow of a space shuttle launch plume point toward the Moon? In early 2001 during a launch of Atlantis, the Sun, Earth, Moon, and rocket were all properly aligned for this photogenic coincidence.

Venus and Jupiter on the Horizon
26.11.2019

What are those two bright objects on the horizon? Venus and Jupiter. The two brightest planets in the night sky passed very close together -- angularly -- just two days ago. In real space, they were...

APOD: 2024 June 10 Б Sh2 132: The Lion Nebula
10.06.2024

Is the Lion Nebula the real ruler of the constellation Cepheus? This powerful feline appearing nebula is powered by two massive stars, each with a mass over 20 times greater than our Sun. Formed...

APOD: 2025 July 31 Б Supernova 2025rbs in NGC 7331
31.07.2025

A long time ago in a galaxy 50 million light-years away, a star exploded. Light from that supernova was first detected by telescopes on planet Earth on July 14th though, and the extragalactic transient is now known to astronomers as supernova 2025rbs.

Trapezium: Teardrops in My Skies
16.01.1997

Sometimes the unexpected comes in a familiar shape. In this recently released picture, the seemingly familiar teardrop-shaped object just right of center is actually an unusually situated disk of gas and dust. In fact, the teardrop is about the size of our own Solar System and is racing against time to condense and form planets.

Rampaging Fronts of the Veil Nebula
7.03.1996

A supernova explosion of a high-mass star results in fast moving blast waves. At the front of the waves shown above, ionized gas in the Veil Supernova Remnant rushes out from the explosion, sweeps up material, and breaks up many atoms into constituent ions and electrons.