Chandra X-ray Observatory at 25 - See amazing 'never-before-seen' views' - YouTube - Space.com - astrophysics/cosmology

The Chandra X-ray Observatory was launched from Space Shuttle Columbia on 22 July 1999,NASA Astronaut Eileen Collins,commander.*Credit:NASA/CXC/A.Hobart*Cosmology is the study of the origins and structures of the universe.

The Big Build: Watch the Giant Core Stage for SLS Moon Rocket Come Together - YouTube - NASA Marshall Space Flight Center

Boeing builds the SLS rocket and Aerojet Rocketdyne builds the RS-25 advanced Space Shuttle main engines.*Boeing (BA),Aerojet Rocketdyne Holdings (AJRD)*Artemis II is slated for a September 2025 luanch.The mission will take humans farther from Earth than ever before.

Boeing Crew Flight Test Training Resource Reel (1080)

The NASA Astronauts for the Crew Test Flight of the Boeing CST-100 Starliner spacecraft are Captain Barry "Butch" Wilmore USN,commander,and Captain Sunita "Sunni" Williams USN ret.,pilot.Both are veterans of the ISS and Space Shuttle Program with two missions each,although Sunni Williams rode a Soyuz spacecraft to one of her missions as a NASA Flight Engineer.This will be their 3rd spaceflight.They are slated to launch no earlier than 1 May 2024 on a United Launch Alliance Vulcan Centaur rocket from Cape Canaveral Space Force Station.ULA Is a joint venture of Boeing and Lockheed Martin.*Boeing (BA),Lockheed Martin (LMT)

NASA test-fires Artemis moon rocket engines for first time in 2024 - NASA Stennis Space Center,Mississippi

These RS-25 main engines are a legacy Space Shuttle main engine newly built in an advanced version by Areojet Rocketdyne for Artemis V and above.Aerojet Rocketdyne Holdings Inc (AJRD)

Apollo astronaut Thomas K. Mattingly II remembered by NASA

He was also a Rear Admiral in the US Navy,and was one of only two astronauts to fly in both the Apollo and Space Shuttle Programs.