Behind CL1358+62: A New Farthest Object
31.07.1997

What if we could see back to the beginning of the universe? At one tenth the universe's present age, we might see galaxies forming. But what did galaxies look like when they were forming?

Interacting Galaxies
10.07.1998

This dramatic image of an interacting pair of galaxies was made using the 1.5 meter telescope at the Cerro Tololo Inter-American Observatory near La Serena, Chile. NGC 1531 is the background galaxy with a bright core just above center and NGC 1532 is the foreground spiral galaxy laced with dust lanes.

Mysterious Streaks Over Turkey
15.08.2007

What are they? Five streaks near the bottom of the above image taken near Ankara, Turkey on Sunday would be identified at first glance as meteors from the Perseids meteor shower peaking just that night. Unexpectedly, however, these streaks do not point back to the Perseids radiant in Perseus. Their origin is therefore somewhat unclear.

Vela Supernova Remnant
5.03.2008

The plane of our Milky Way Galaxy runs through this complex and beautiful skyscape. At the northwestern edge of the constellation Vela (the Sails) the 16 degree wide, 30 frame mosaic is centered on the glowing filaments of the Vela Supernova Remnant, the expanding debris cloud from the death explosion of a massive star.

NGC 3621: Far Beyond the Local Group
19.09.2009

Far beyond the local group of galaxies lies NGC 3621, some 22 million light-years away. Found in the multi-headed southern constellation Hydra, the winding spiral arms of this gorgeous island universe are loaded with luminous young star clusters and dark dust lanes.

Ultraviolet Andromeda
27.10.2010

This stunning vista represents the highest resolution image ever made of the Andromeda Galaxy (aka M31) at ultraviolet wavelengths. Recorded by NASA's Swift satellite, the mosaic is composed of 330 individual images covering a region 200,000 light-years wide.

Nearby Spiral Galaxy NGC 4945
25.02.2022

Large spiral galaxy NGC 4945 is seen nearly edge-on in this cosmic galaxy close-up. It's almost the size of our Milky Way Galaxy. NGC 4945's own dusty disk, young blue star clusters, and pink star forming regions stand out in the colorful telescopic frame.

APOD: 2023 May 29 Б Milky Way over a Turquoise Wonderland
28.05.2023

What glows there? The answer depends: sea or sky? In the sea, the unusual blue glow is bioluminescence. Specifically, the glimmer arises from Noctiluca scintillans, single-celled plankton stimulated by the lapping waves. The plankton use their glow to startle and illuminate predators.

APOD: 2024 February 14 Б Rosette Deep Field
13.02.2024

Can you find the Rosette Nebula? The large, red, and flowery-looking nebula on the upper left may seem the obvious choice, but that is actually just diffuse hydrogen emission surrounding the Cone and Fox Fur Nebulas.

The Fox Fur Nebula
1.07.2002

The nebula surrounding bright star S Mon is filled with dark dust and glowing gas. The strange shapes that surrounding this star originate from fine interstellar dust reacting in complex ways with the energetic light and hot gas being expelled by the young stars.