Mystery missile: Pentagon and NASA experts say the mysterious plume off southern California Monday was probably made by a jetliner and not by some mystery missile.
In one of the most detailed astronomical images ever produced, NASA's Hubble Space Telescope captured an unprecedented look at the Orion Nebula. This turbulent star formation region is one of astronomy's most dramatic and photogenic celestial objects. More than 3,000 stars of various sizes appear in this image.
On Saturday and Sunday, the National Park Service will not charge entrance fees at 146 national-park sites where visitors normally pay $3 to $25 for admission.
Construction began last week on a wind power plant in the Mojave Desert. Its developers say it will be the nation's biggest but it comes amid dimming prospects for wind power in the US.
Los Angeles wildfire has California firefighters scrambling to keep it from spreading any further.
A Pakistani rescue worker shows a picture album found in the wreckage of a plane that crashed near Islamabad, Pakistan on Wednesday.
The Tehachapi fire is actually two separate blazes that had burned as many as 40 homes by mid-day Wednesday.
Virgin Galactic SpaceShipTwo spacecraft, the VSS Enterprise, could make its first drop flights over California's Mojave Desert for glide and landing tests this fall, says the company.
Under NASA's new space plan, commercial spacecraft and services have a larger role than before.
The Mojave cross, which the US Supreme Court two weeks ago ruled could stay, was removed early this week, sparking outrage.