On Dec. 18, 1999, NASA launched its flagship Terra satellite into Earth's orbit to collect data about Earth's changing climate. Terra contains five different sensors that monitor Earth's atmosphere, lands,

NASA’s DiskSat launched into low Earth orbit early Thursday morning from the company’s Launch Complex 2 on Wallops Island, Virginia. Four plate-shaped spacecraft demonstrated a new small spacecraft technology that aims to lower mission costs and expand access to space.

NASA astronaut Jonny Kim flew home with two Roscosmos cosmonauts from the International Space Station packed tight in their Soyuz spacecraft landing in the frozen steppes of Kazakhstan on Dec. 9 to complete an eight-month stay in space.

The 38-foot-wide space rock is projected to come to within just 123,000 miles of our planet, according to NASA.

NASA’s latest measurements show that Earth is reflecting less sunlight back into space, a subtle dimming that carries outsized consequences for the climate system. At the same time, cleaner air for roughly 1.