This photograph shows ripples in the surface of Denman Glacier in East Antarctica that throw shadows against the ice. via NASA https://ift.tt/2WMGbRF

NASA’s new three-dimensional portrait of methane concentrations shows the world’s second largest contributor to greenhouse warming. via NASA https://ift.tt/3am6OkG

Christina Koch handles media bags that enable the manufacturing of organ-like tissues using the BioFabrication Facility (BFF), a 3-D biological printer on the International Space Station. via NASA https://ift.tt/2QDVHLW

The central region of our galaxy, the Milky Way, contains an exotic collection of objects. via NASA https://ift.tt/3dpMosD

Michelle Lynde is an aerospace engineer who conducts aerodynamic analysis of configurations using Computational Fluid Dynamics tools, wind tunnel experiments and flight tests. via NASA https://ift.tt/2IZYVoH

Former astronaut Al Worden, command module pilot on the Apollo 15 lunar landing, passed away March 18, 2020, in Texas.​ via NASA https://ift.tt/2xKO0wO

An alligator lurks in a marshy waterway at NASA’s Kennedy Space Center in Florida. The center shares a border with the Merritt Island National Wildlife Refuge. via NASA https://ift.tt/38ZzqhW

With the USS John P. Murtha (LPD 26) in the distance, helicopters from the HSC-23 squadron fly by a test version of an Orion capsule during Underway Recover y Test-8 in the Pacific Ocean. via NASA https://ift.tt/39X3agV

Expedition 63 crewmembers Chris Cassidy of NASA (left) and Anatoly Ivanishin (center) and Ivan Vagner of Roscosmos (right) pose for pictures in front of a Soyuz trainer. via NASA https://ift.tt/3d69iFi

Michun North is a program analyst, who helps manage finances for the Commercial Crew Program. via NASA https://ift.tt/2U1SLd0