Orson John helps prepare Ice, Cloud and land Elevation Satellite-2 (ICESat-2) for encapsulation in the United Launch Alliance Delta II payload fairing on Sept. 4, 2018, at Space Launch Complex 2 at Vandenberg Air Force Base in California. via NASA https://ift.tt/2JUXFV0

The Northrop Grumman Antares rocket, with Cygnus resupply spacecraft onboard, launches from Pad-0A of NASA’s Wallops Flight Facility, Saturday, November 2, 2019. via NASA https://ift.tt/33jpAFG

From the vantage point of space aboard the International Space Station, NASA astronaut Andrew Morgan captured this image of a California wildfire. via NASA https://ift.tt/2C0WleU

A Northrop Grumman Antares rocket is seen as it rolls out to Pad-0A, Tuesday, Oct. 29, 2019, at NASA’s Wallops Flight Facility in Virginia. via NASA https://ift.tt/2JAFeop

This view from NASA’s Juno spacecraft captures colorful, intricate patterns in a jet stream region of Jupiter’s northern hemisphere known as “Jet N3.” via NASA https://ift.tt/2BYmNWd

This image of star trails was compiled from time-lapse photography taken by NASA astronaut Christina Koch while onboard the International Space Station. via NASA https://ift.tt/2MU6zE0

Astronomers using data from NASA’s Chandra X-ray Observatory and other telescopes have put together a detailed map of a rare collision between four galaxy clusters. via NASA https://ift.tt/2WfBlKL

The Medusa merger, was not always one entity, but two. An early galaxy consumed a smaller gas-rich system, throwing out streams of stars and dust into space. These streams resemble the writhing snakes that Medusa, a monster in ancient Greek mythology, famously had on her head in place of hair, lending the object its intriguing name. via NASA https://ift.tt/2M6YhXC

Engineers and technicians at NASA’s Michoud Assembly Facility in New Orleans have structurally mated the first of four RS-25 engines to the core stage for NASA’s Space Launch System (SLS) rocket that will help power the first Artemis mission to the Moon. via NASA https://ift.tt/31CuETR

Vice President Mike Pence delivers remarks during the opening ceremony of the 70th International Astronautical Congress. via NASA https://ift.tt/2Pa9Pwo