This photo, captured by the NASA Hubble Space Telescope's Advanced Camera for Surveys, is Hubble's latest view of an expanding halo of light around the distant star V838 Monocerotis, or V Mon, caused by an unusual stellar outburst that occurred back in January 2002. A burst of light from the bizarre star is spreading into space and reflecting off of surrounding circumstellar dust. As different parts are sequentially illuminated, the appearance of the dust changes. This effect is referred to as a "light echo". NASA
Serene blue hues highlight this view of Saturn's northern hemisphere from the Cassini spacecraft. The image has been adjusted to approximate the natural blue color of visible sunlight scattered by the gas giant's upper atmosphere. Saturn's famous rings cast the dark shadows stretching across the frame with infamous cratered moon Mimas lurking at the lower left. Cassini Imaging Team/SSI/JPL/ESA/NASA
This false color picture of Saturn's northern hemisphere was assembled from ultraviolet, violet and green images obtained by Voyager 2 from a range of 4.4 million miles. The several weather patterns evident include three spots flowing westward at about 33 mph. NASA/JPL
The second manned lunar landing mission, Apollo 12 launched from launch pad 39-A at Kennedy Space Center in Florida on November 14, 1969 via a Saturn V launch vehicle. The LM, Intrepid, landed astronauts Conrad and Bean on the lunar surface in what's known as the Ocean of Storms while astronaut Richard Gordon piloted the CM, Yankee Clipper, in a parking orbit around the Moon. Lunar soil activities included the deployment of the Apollo Lunar Surface Experiments Package, finding the unmanned Surveyor 3 that landed on the Moon on April 19, 1967, and collecting 75 pounds of rock samples. NASA
What does the surface of Titan look like? Thick clouds have always made Saturn's largest moon so mysterious that seemingly farfetched hypotheses like methane rain and lakes have been seriously considered. In this depiction, orange hydrocarbons color a landscape covered with lakes and peaks of frozen methane and ammonia. For illustration purposes, the Huygens probe is drawn parachuting down with an oversized Cassini spacecraft orbiting above. Craig Attebery/ESA/NASA
This artist's concept depicts the Apollo-Soyuz Test Project, the first international docking of the U.S.'s Apollo spacecraft and the USSR's Soyuz spacecraft in space. The objective of the ASTP mission was to provide the basis for a standardized international system for docking of marned spacecraft. The spacecrafts were launched in 1975. They performed spacecraft rendezvous, docking and undocking, conducted intervehicular crew transfer, and demonstrated the interaction of US and USSR control centers and spacecraft crews. NASA
This NASA project has developed new technology with the aid of today's advanced computers by allowing an object to be x-rayed using an absorption pattern, then sending this data to the computer where it calculates the data into pixels which inturn develops an image. This new technology is being used in fields like astronomy, astrophysics and medicine. NASA
Taken during the Viking Orbiter 1's 40th revolution of Mars in 1975, this electronically transmitted image shows sunrise over the tributary canyons of a high plateau region. The white areas are bright clouds of water ice. NASA Langley Research Center
Tracks left by NASA's Mars Exploration Rover Opportunity as it traveled along the rim of Victoria Crater can be seen clearly in this image taken by the High Resolution Imaging Science Experiment camera on NASA's Mars Reconnaissance Orbiter spacecraft. This is a subframe of a larger image that the camera acquired on June 26, 2007. NASA/JPL/University of Arizona
With its thick, distended atmosphere, Titan's orange globe shines softly, encircled by a thin halo of purple light-scattering haze. Images taken using blue, green and red spectral filters were used to create this enhanced-color view; the color images were combined with an ultraviolet view that makes the high-altitude, detached layer of haze visible. NASA/JPL/Space Science Institute
Rebel advances in the Donetsk region are forcing evacuations, including in Debaltseve.
ByPeter Leonard, The Associated Press
Petr David Josek/AP
Outgoing heavy-caliber fire boomed incessantly, shaking the ground and rattling windows around the besieged town. Residents of Debaltseve, seemingly inured to the racket, listened impassively as they mustered at the town hall on Saturday to be evacuated with as many belongings as they could carry.