In Pictures: Exploring Mars with Curiosity
In Pictures: Meteors
In Pictures: Space photos of the day: Dancing with the Stars
In Pictures: Space photos of the day: Black Holes
In Pictures: Space Photos of the Day: Asteroids
In Pictures: Space photos of the day: Visions of the future
In Pictures: Space photos of the day: Massive Storms
In Pictures: Space photos of the day: Gas giants
In Pictures: Space photos of the day: Heavenly Rings
In Pictures: Space photos of the day: Female Astronauts
In Pictures: Space photos of the day: The Moon
In Pictures: Space photos of the day: A Blue Planet
This citizen journalism photo taken with a cell phone by Stefanie Gordon aboard a passenger flight from New York to Palm Beach, Fla. shows the Space Shuttle Endeavour as it streaks toward orbit shortly after liftoff on May 16. Gordon says she had just awakened from a nap on the flight when the pilot announced the shuttle might come into view. Stefanie Gordon/AP
The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., on May 1, on its way to a 14-day mission to the International Space Station.
The crew of space shuttle Endeavour, clockwise from left, British born US astronaut, pilot Greg Johnson, European Space Agency astronaut Roberto Vittori, of Italy, Canadian born US astronaut Greg Chamitoff, mission specialist Drew Feustel, mission specialist Mike Fincke and commander Mark Kelly, leave the Operations and Checkout building on their way to the launch pad on May 16.
In this Jan. 10, 1996 file picture, a flock of birds takes flight while the Rotating Service Structure inches away from the space shuttle Endeavour at Kennedy Space Center in Cape Canaveral, Fla. April 29, 2011 is the scheduled launch date for the 25th and final flight of Endeavour, NASA's youngest shuttle that was built to replace the Challenger and first soared in 1992, six years after the launch accident. And it will be the second-to-last shuttle mission, as NASA winds down the 30-year shuttle program with the last launch of Atlantis in early summer 2011.
In this Jan. 20, 1996 file picture, moisture trails off the wings of the space shuttle Endeavour as it flies over floodlights before touching down at the Kennedy Space Center in Cape Canaveral.
En route to the International Space Station, Space Shuttle Endeavor and its seven member STS-118 crew, blasted off from the launch pad at Kennedy Space Center on August 8, 2007.
Space Shuttle Endeavour shines atop its twisted contrail as it soars into space on mission STS-108 in 2001.
The Space Shuttle Endeavour mounted atop its modified Boeing 747 carrier aircraft flies over California's Mojave Desert on its way back to the Kennedy Space Center in Florida on Dec 10, 2008.
Backdropped by a blue and white Earth and the blackness of space, Space Shuttle Endeavour, docked to the Destiny laboratory of the International Space Station, is featured in this image photographed by a crewmember during the STS-118 mission's third planned session of extravehicular activity (EVA). The shuttle's Canadian-built Remote Manipulator System (RMS) robotic arm and station's Canadarm2 are also featured in the scene. The SPACEHAB pressurized logistics module is visible in Endeavour's payload bay.
Astronaut John H. Casper, commander, pauses during a photography session on the aft flight deck of the Space Shuttle Endeavour in 1996.
The 16th American assembly flight and 112th overall American flight to the International Space Station launched on Nov. 23, 2002 from Kennedy's launch pad 39A aboard the Space Shuttle Orbiter Endeavor STS-113. Mission objectives included the delivery of the Expedition Six Crew to the ISS, the return of Expedition Five crew back to Earth, and the installation and activation of the Port 1 Integrated Truss Assembly.
This Monday, Nov. 25, 2002 file picture shows the space shuttle Endeavour over New Zealand as it approaches the International Space Station for docking.
In this early Saturday morning Jan. 20, 1996 picture provided by NASA, the space shuttle Endeavour glides towards a landing on Kennedy Space Center's Runway 15 in Cape Canaveral, Fla. It was only the eighth time in 74 missions that NASA shuttles had landed in the dark, necessitated by the course the shuttle had to follow in chasing down a satellite.
This is a Space Shuttle mission STS-61 onboard view showing astronauts Story Musgrave and Jeffrey Hoffman preforming repairs to the Hubble Space Telescope during their Extra Vehicular Activity. Astronauts' work was made easier by the HST's many crew aids. Astronaut Musgrave makes use of one of the spacecraft's handholds. Launched on December 1, 1993, the Space Shuttle Orbiter Endeavor STS-061 mission was the 59th Shuttle flight.
STS-49, the first flight of the Space Shuttle Orbiter Endeavour, lifted off from launch pad 39B on May 7, 1992. The STS-49 mission was the first US orbital flight to feature 4 extravehicular activities, and the first flight to involve 3 crew members working simultaneously outside of the spacecraft. The primary objective was the capture and redeployment of the INTELSAT VI which was stranded in an unusable orbit since its launch aboard the Titan rocket in March 1990.
This Saturday, Sept. 9, 1995 file picture made from video shows the tail and robot arm of the space shuttle Endeavour in front of hurricane Luis in the Atlantic Ocean.
Astronaut James S. Voss, payload commander, is pictured during the Sept. 16, 1995, Extravehicular Activity (EVA) which was conducted in and around Space Shuttle Endeavour's cargo bay. Voss, whose visor reflects Endeavour's forward section, was standing on a mobile foot restraint attached to the arm of the Remote Manipulator System (RMS).
Astronaut F. Story Musgrave, anchored on the Space Shuttle Endeavor's robotic arm, prepares to be elevated to the top of the Hubble Space Telescope during Hubble's first servicing mission in 1993. 
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Photos of the Day: Photos of the day 05/15
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In preparation for the space shuttle Endeavour's final journey from Los Angeles International Airport to the California Science Center crews are clearing trees. The center plans to replace the trees and improve the city's landscape, but some residents are unhappy.
Los Angeles is trading the trees for the stars — and not everybody's happy about it.
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