The Hubble Space Telescope. Original from NASA. Digitally enhanced by rawpixel.

By James J. Gutierrez

The Hubble Space

The Hubble Space Telescope. Original from NASA. Digitally enhanced by rawpixel.

Space shuttle Discovery stands tall on Launch Pad 39A at NASA's Kennedy Space Center in Florida as space center workers prepare to move the rotating service structure into place. Original from NASA. Digitally enhanced by rawpixel.

By Jeffrey B. Timm

Space shuttle Discovery

Space shuttle Discovery stands tall on Launch Pad 39A at NASA’s Kennedy Space Center in Florida as space center workers prepare to move the rotating service structure into place. Original from NASA. Digitally enhanced by rawpixel.

Space shuttle Atlantis and its four-member STS-135 crew head toward Earth orbit and rendezvous with the International Space Station, 8 July 2011. Original from NASA . Digitally enhanced by rawpixel.

By Lisa J. Valvo

Space shuttle Atlantis

Space shuttle Atlantis and its four-member STS-135 crew head toward Earth orbit and rendezvous with the International Space Station, 8 July 2011. Original from NASA . Digitally enhanced by rawpixel.