Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
Atlantis is the first of three shuttles that are ending their flying careers and eventually heading to museums.
The planet's northern ice cap has two remarkable features that have puzzled scientists for almost 40 years.
After a successful 5-month operation, the Phoenix has been deemed officially dead by NASA.
Alignment is important in navigating a space potty.
Doomed planet could be enveloped by its parent star within next 10 million years.
World's largest inflatable vehicle will become a stratospheric satellite, say its developers.
A rocket carrying the Venus climate orbiter called "Akatsuki" blasted off from a Japanese space center May 21.
NASA's Viking 1 spent more than six years on Mars, but Opportunity, one of the twin rovers that landed in 2004, has surpassed that record.
The new star spews huge quantities of calcium, which could account for the calcium present in our bones.
New information may solve mystery about why the universe is composed of matter and not antimatter.
Scientists want to analyze rock and soil samples for traces of alien bacteria or chemical or biological indicators of life.
Scientists think light flickers from exoplanets may show the presence of oceans, continents, and perhaps life.
This is the first of three spacewalks scheduled during Atlantis' final mission.
As Atlantis gets ready for it's final flight, experts share cool, little known facts about the iconic shuttle.
New study looks to see if Earth's bacteria could survive on the red planet.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.