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The @NASAKennedy launch team recently completed the first of many mission simulations for #Artemis II, the first crewed Artemis mission.

Simulations help ensure that both team members and their software are prepared and up-to-date for a safe launch: go.nasa.gov/3Q8PQxK
#NASAArtemis #Artemis



.@NASAWebb detected water vapor around a distant star in a region where rocky planets could be forming. This steamy environment raises the question: Where did the water come from? Pore over the details:
go.nasa.gov/3KaVlbo
#NASA
#NASA
in reply to NASA

It's also possible that water vapour may have evaporated from a planet that once resembled earth but has dried to a rocky desert, like Mars.
We may be witnessing the aftermath of catastrophic climate change in that region.


#Landsat 8 and 9 also measure land surface temperature with Thermal Infrared Sensor (TIRS) and TIRS-2. These data are crucial for water management and ice detection.

#DYK that TIRS almost didn’t exist? Now it’s been imaging Earth for over a decade! go.nasa.gov/3OSCDbH
#NASAEarth



Both Landsat 8 and 9 have optical sensors that collect beautiful images of Earth. 😍 🌏

Called the Operational Land Imager (OLI) and OLI-2, these sensors take measurements in the visible, near infrared, and shortwave infrared portions of the electromagnetic spectrum.
#NASAEarth



51 years of eyes on Earth 👀🛰

Since 1972, the #Landsat program has been studying Earth’s land, water, ice and more.

There are currently three active @nasa @usgs Landsat satellites orbiting Earth — Landsat 7, 8, and 9 — with Landsat Next on the horizon. go.nasa.gov/3Nxxl4w
#NASAEarth



The Exp 69 crew kicks off a busy start to the week with space biology, human health research, robotics work and station maintenance. blogs.nasa.gov/spacestation/20…
#ISS
#iss


Under construction 🚧
When @NASAWebb looked at a developing planetary system, it detected water vapor in the building materials, in the region where rocky planets like Earth may be forming: go.nasa.gov/3O5LR2j
#NASAExoplanets


Webb detected water in the inner disk of PDS 70, within 100 million miles of the star. Though we’ve seen water in similar disks, Webb’s discovery is the first detection of water in the “rocky planet zone” of a system known to have 2 or more developing planets.
#JamesWebb
in reply to NASA

So all we have to do is wait a few billion years, and we can hope for extraterrestrial life?


On our world, water is life. But how did it get here? Are there similar environments around other stars?

Webb has us one step closer to answers. In a still-developing “solar system,” Webb detected water in the zone where rocky planets like Earth may form: go.nasa.gov/3O5LR2j
#JamesWebb



Join us in celebrating @NASAInterns! Ahead of #NationalInternDay, July 27, hear from current and former interns, and discover the work they do.

Interested in interning with us, or know someone who might? Spring internship applications are due Aug. 31: go.nasa.gov/44WNcPJ
#NASA



Zenbleed: an AMD Zen 2 speculative vulnerability lwn.net/Articles/939099/ #LWN
#lwn


What's your vibe? Calm? Creative? Ever ready? Smart? (A mix?)
Take our fun quiz to get your results and learn the perfect exoplanets for you! Share your results and tag us! go.nasa.gov/44SCw4G
#MondayMotivation
#NASAExoplanets


NASA Administrator Dr. Thomas Paine (left) and U.S. President Richard M. Nixon wait aboard the U.S.S. Hornet recovery ship for the splashdown of the Apollo 11 command module #OTD in 1969.

Read more about Apollo 11's return to Earth: go.nasa.gov/3OghnvV
#NASAhistory



Chemicals Glow as a Meteor Disintegrates apod.nasa.gov/apod/ap230724.ht… #APOD
#APOD


Chemicals Glow as a Meteor Disintegrates

Image Credit & Copyright: Michael Kleinburger

apod.nasa.gov/apod/ap230724.ht… #APOD

#APOD


Irradiated planets☢️
After a star goes supernova, its leftover core can rotate quickly, blasting pulses of radiation at intervals typically ranging from milliseconds to seconds. Orbiting pulsar planets would be hellish wastelands. We💚 them. exoplanets.nasa.gov/resources/…
#NASAExoplanets


Look on the bright side! No, really – see how the left side appears brighter in color?

It's caused by differences in sand cover. The western side of Egypt’s Lake Nasser is covered by sand and the eastern side is mostly rock. go.nasa.gov/3rJy6ib

📷: @Space_Station astronaut
#NASAEarth



Happy 24th birthday @chandraxray! Seen here just before being deployed from Space Shuttle Columbia (STS-93) #OTD in 1999, this powerful space observatory was initially expected to function for 5 years.

Read how Chandra has vastly advanced X-ray astronomy: go.nasa.gov/3OfPXWV
#NASAhistory



The Antikythera Mechanism apod.nasa.gov/apod/ap230723.ht… #APOD
#APOD


The Antikythera Mechanism

Image Credit & License: Marsyas, Wikipedia

apod.nasa.gov/apod/ap230723.ht… #APOD

#APOD


A ''dream'' planet?🩷
GJ 504 b is still glowing from the heat of its formation 160 million years ago. Astronomers say it is dark magenta, or the color of cherry blossoms. It orbits a star faintly visible to the unaided eye in the constellation Virgo. exoplanets.nasa.gov/news/116/m…
#NASAExoplanets


Our @nasa booth at #ComicCon introduced the Exoplaneteers explorers, and the fun doesn't end there! Take our personality quiz to get an exoplanet just right for you. Exoplanets.nasa.gov
#NASAExoplanets


Leave it to beavers to improve Earth’s ecosystems! 🦫

Scientists are studying how beavers impact ecosystems using @NASA_Landsat and Sentinel data, which help them compare across larger locations and over time. go.nasa.gov/3rszBkK

[Video embedded in original tweet]
#NASAEarth



An unbeatable view

As the Apollo 11 astronauts make their way back home, they capture this image of Earth not long after leaving the Moon's gravitational sphere of influence.

See more photos captured by the Apollo 11 astronauts: go.nasa.gov/43todCz
#NASAhistory



This week at NASA:

• A swath of small satellites headed into orbit
• Our new hurricane-observing satellites viewed their first storms
• We kept our “A” for investing in small businesses

Keep up with all things space and aeronautics: nasa.gov/subscribe

[Video embedded in original tweet]
#NASA

#NASA


Apollo 11: Armstrong's Lunar Selfie apod.nasa.gov/apod/ap230722.ht… #APOD
#APOD


Apollo 11: Armstrong's Lunar Selfie

Image Credit: NASA, Apollo 11, Neil Armstrong; Processing: Michael Ranger

apod.nasa.gov/apod/ap230722.ht… #APOD

#APOD


El administrador de NASA viajará a Sudamérica, hablará de cooperación nasa.gov/press-release/el-admi… #NASA
#NASA


NASA Administrator to Head to South America; Discuss Space Cooperation nasa.gov/press-release/nasa-ad… #NASA
#NASA


Louisiana Students to Hear from NASA Astronauts Aboard Space Station nasa.gov/press-release/louisia… #NASA
#NASA


Galactic Cirrus: Mandel Wilson 9

Image Credit & Copyright: Gabriel Rodrigues Santos

apod.nasa.gov/apod/ap230721.ht… #APOD

#APOD


Galactic Cirrus: Mandel Wilson 9 apod.nasa.gov/apod/ap230721.ht… #APOD
#APOD


Our daredevil spacecraft is almost home! On Sept. 24, after a seven-year-long journey #ToBennuAndBack, OSIRIS-REx will return to Earth with a sample of asteroid Bennu.

Mission updates: blogs.nasa.gov/osiris-rex/

[Video embedded in original tweet]
#NASASolarSystem



NASA, White House Advance Historically Black Scholar Recognition nasa.gov/press-release/nasa-wh… #NASA
#NASA


NASA Awards Integrated Mission Operations Contract III nasa.gov/press-release/nasa-aw… #NASA
#NASA


A third round of eye exams and more station maintenance topped today’s schedule for the Exp 69 crew. blogs.nasa.gov/spacestation/20…
#ISS
#iss


Our @nasa team debuted a new cast of exoplanet explorers, the Exoplaneteers, today at #ComicCon! Take our fun quiz to find out what kind of explorer you are, and get the perfect planet for you! Check it all out at exoplanets.nasa.gov!
#NASAExoplanets


What kind of exoplanet explorer are you? Cool and calm, or eager and excited? Are you always prepared, or more impulsive? Take our quiz to find out, and get the perfect exoplanet for you! exoplanets.nasa.gov/quizzes/ex…
#NASAExoplanets


A total eclipse will sweep across North America on April 8, 2024. In preparation, we have awarded funding for three science teams to conduct citizen science investigations that will help study the Sun. Here are three ways you'll be able to take part: go.nasa.gov/43CDlO2
#NASA
#NASA


One small step.

OTD 54 years ago, Apollo 11 crewmembers became the first human beings to set foot on the lunar surface.

Today, we’re building on the legacy of Apollo as we prepare to establish a long-term human infrastructure on the Moon with #Artemis. #InternationalMoonDay
#NASA

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