This is a composite image of the active galaxy M82 from infrared observations by Spitzer Space Telecope in three wavelength bands coded in red (longest wavelength), green, and blue (shortest wavelengths).
On a spacewalk, astronaut Owen K. Garriott, science pilot, retrieves an imagery experiment from the Apollo Telescope Mount attached to the Skylab in Earth orbit in 1973.
Astronomers may have found a way to better understand dark energy, by observing the way gravity bends light reaching the Earth.
The ground-based image of Comet 17P/Holmes was taken November 1, 2007, by astrophotographer Alan Dyer. The observations were made in southern Alberta, Canada.
A reproduction of a portion of the lunar surface was constructed on the concrete pad where the Lunar Excursion Module Simulator (LEMS) was tested at the NASA Langley Research Center in Hampton, Virginia. The LEMS was a manned rocket-powered vehicle used to familiarize the Apollo astronaut with the handling characteristics of a lunar-landing type vehicle. The vehicle was designed and fabricated at Langley.
At about 300 feet from the cargo bay of the space shuttle Challenger, Bruce McCandless II was farther out than anyone had ever been before. Guided by a Manned Maneuvering Unit (MMU), astronaut McCandless, pictured above, was floating free in space. McCandless and fellow NASA astronaut Robert Stewart were the first to experience such an 'untethered space walk' during Space Shuttle mission 41-B in 1984. The MMU works by shooting jets of nitrogen and has since been used to help deploy and retrieve satellites.
The moon Tethys floats before the massive, golden-hued globe of Saturn in this natural color view. The thin, dark line of the rings curves around the horizon at top.
The Antennae galaxies, located about 62 million light years from Earth, are shown in this composite image from the Chandra X-ray Observatory (blue), the Hubble Space Telescope (gold), and the Spitzer Space Telescope (red).The collision, which began more than 100 million years ago and is still occurring, has triggered the formation of millions of stars in clouds of dusts and gas in the galaxies. The most massive of these young stars have already sped through their evolution in a few million years and exploded as supernovas.
On August 1, almost the entire Earth-facing side of the sun erupted in a tumult of activity. This image from the Solar Dynamics Observatory shows the C3-class solar flare (white area on upper left), a solar tsunami (wave-like structure, upper right), multiple filaments of magnetism lifting off the stellar surface, large-scale shaking of the solar corona, radio bursts, a coronal mass ejection and more.
By spying on a neighboring galaxy, NASA's Hubble Space Telescope has captured an image of a young, globular-like star cluster - a type of object unknown in our Milky Way Galaxy. The double cluster NGC 1850 lies in a neighboring satellite galaxy, the Large Magellanic Cloud.