loop

 

A part of barnard loop and Messier 78


Astronomy Picture of the Day: Across Corona Australis

Cosmic dust clouds are draped across a rich field of stars in this broad telescopic panorama near the northern boundary of Corona Australis, the Southern Crown.

Astronomy Picture of the Day: Swirls and Colors on Jupiter from Juno

What creates the colors in Jupiter's clouds? No one is sure. The thick atmosphere of Jupiter is mostly hydrogen and helium, elements which are colorless at the low temperatures of the Jovian cloud tops.

Astronomy Picture of the Day: Comet 46P/Wirtanen

Periodic Comet 46P/Wirtanen is now the brightest comet in the night sky, but too faint to be seen by eye.

Astronomy Picture of the Day: Mars in the Loop

This composite of images spaced some 5 to 9 days apart, from late April (bottom right) through November 5 (top left), traces the retrograde motion of ruddy-colored Mars through planet Earth's night sky.

Astronomy Picture of the Day: Jupiter in Ultraviolet from Hubble

Jupiter looks a bit different in ultraviolet light.

Astronomy Picture of the Day: Orion in Red and Blue

When did Orion become so flashy? This colorful rendition of part of the constellation of Orion comes from red light emitted by hydrogen and sulfur (SII), and blue-green light emitted by oxygen (OIII).

Astronomy Picture of the Day: Sun Dance

Sometimes, the surface of our Sun seems to dance.

Astronomy Picture of the Day: Stars and Dust in Corona Australis

Cosmic dust clouds and young, energetic stars inhabit this telescopic vista, less than 500 light-years away toward the northern boundary of Corona Australis, the Southern Crown.

Astronomy Picture of the Day: A Solar Filament Erupts

What's happened to our Sun? Nothing very unusual -- it just threw a filament. Toward the middle of 2012, a long standing solar filament suddenly erupted into space producing an energetic Coronal Mass Ejection (CME).

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