#OTD 50 years ago, Apollo 15 astronauts ventured onto the lunar surface and took this rover for a spin. It was the first time we drove on the Moon. Inspired by the past, we’re developing rover tires for new missions on the Moon and Mars. Explore our work: nasa.gov/specials/wheel…

The launch of @NASA's @BoeingSpace Orbital Flight Test-2 mission is now targeted for Tuesday, Aug. 3 at 1:20 p.m. ET. Live coverage will begin at 12:30 p.m. ET. The Starliner spacecraft will dock to the @Space_Station on Wednesday, Aug. 4 at 1:37 p.m. ET.

💫 It’s time for one of the biggest meteor showers of the year – the Perseids! Here’s how you can watch them at their peak in mid-August: go.nasa.gov/379jpaX 📸: @nasahqphoto

Everything is better on Satur(N)day 🪐 Saturn is known for its massive ring system extending about 175,000 miles from the planet. The rings consist of billions of chunks of ice & rock, which can be as large as mountains! Learn more from @NASASolarSystem: go.nasa.gov/3jaxday

This week… 🌑 @NASAHubble data reveals new discoveries about Ganymede 🌲 @NASAJPL scientists help create a rainforest vulnerability index And more! Get details by watching the latest episode of This Week at NASA: youtu.be/HpeEIyfQXCc

LAUNCH UPDATE: We're now targeting 1:20pm ET Tues., Aug. 3 for launch of the @BoeingSpace Orbital Flight Test-2 atop a @ulalaunch Atlas V rocket. NASA TV coverage begins at 12:30pm ET. Docking to the @Space_Station is targeted for 1:37pm ET Wed., Aug. 4.

🚀 On Aug. 10, the next delivery of @ISS_Research & supplies launches from @NASAWallops in Virginia. Live in the U.S. mid-Atlantic? You may be able to see @northropgrumman's rocket & cargo spacecraft heading to the @Space_Station! When & where to look up: go.nasa.gov/3rW7ua5

🎉 We are celebrating a decade of @SpaceApps! 🎉 Thousands of participants around the world team up to work with open-source data in a 48-hour sprint to answer some of the pressing challenges for Earth and space. 💻 Register now: go.nasa.gov/3C1MTWb

@glicksa @NASAKennedy @NASAInterns @NASASTEM @WomenNASA @NASApeople @NASAArmstrong Hey, Sara! Love the photo! 🙌 We’re so happy you were able to make it on site and hope to see you back soon.

@UCF @UCFMAE 💫 Congratulations to Ashely! 🤩 We hope to see her as part of our NASA family one day.

@UAlbanyNews

@RomanOtter @NachoHusky @maemunchies @colbyafk @frostbitefox @unevadareno @NosleepPodcast @CreativeMochi @HyenaAgenda 😉 We love what you’ve done with it.

50 years ago today, Apollo 15 landed on the Moon. @NASA_Astronauts David Scott and James Irwin deployed experiments & made the first-ever drives in the Lunar Roving Vehicle, while Al Worden conducted science in lunar orbit aboard the Command Module: go.nasa.gov/3f9ilrV

@Ashkan63529299 The tardigrades are doing well! The crew have been feeding them algae as they live, grow, and reproduce within bioreactors (their home in space). We’re hoping to learn more about how they survive in harsh conditions like microgravity! go.nasa.gov/3okNSZE

This week on the @Space_Station, a Russian module departed, followed by arrival of the Nauka science lab. The next spacecraft set to launch to the station, @BoeingSpace's #Starliner, prepared for liftoff aboard a @ulalaunch rocket. More on #SpaceToGround: youtu.be/jGfGLvwiWmU

#Starliner and Atlas V are in a safe, flight-ready configuration for @BoeingSpace's Orbital Flight Test-2. Currently, the earliest available launch opportunity is 1:20pm ET (17:20 UTC) Tuesday, Aug. 3. Get details on our @Commercial_Crew blog: go.nasa.gov/3ldmDCn

@leighawilcox Currently, the earliest available launch opportunity is 1:20 p.m. EDT Tuesday, Aug. 3. Read more on our @Commercial_Crew blog: blogs.nasa.gov/commercialcrew…

#ICYMI: @NASA and @BoeingSpace have decided to stand down from Friday’s launch attempt of the second Orbital Flight Test (OFT-2) mission. Currently, the earliest available launch opportunity is 1:20 p.m. ET on Tuesday, Aug. 3. Learn more: go.nasa.gov/3icUoln

A recap of today's @Space_Station news and activities: 🛰️ Teams are conducting checkouts of the newly arrived Russian Nauka module 🚀 The #Starliner spacecraft is ready. Stay tuned for a new launch date for @BoeingSpace's Orbital Flight Test-2 Details: go.nasa.gov/3zJSY7M

It takes thousands of people on the ground to ensure the safety of the @Space_Station and crew. The @NASA family’s ingenuity and dedication never cease to amaze me and, on days like this one, I’m more thankful than ever for their unparalleled expertise. twitter.com/NASA/status/14…

LIVE: Experts from our @Space_Station & @Commercial_Crew programs provide an update following today's docking of the Russian Nauka module and in advance of the @BoeingSpace Orbital Flight Test-2 launch: nasa.gov/live

Coming up soon: NASA leadership and @Space_Station experts give updates regarding today’s unexpected thruster firings of the Russsian Nauka module. Tune in at 4:30pm ET to learn what this means for operations moving forward: go.nasa.gov/2TIF6eN

Starliner is ready. The move allows the @Space_Station team time to continue working checkouts of the newly arrived Roscosmos’ Nauka module and to ensure the station will be ready for Starliner’s arrival.

NEWS: Alongside our partners at @BoeingSpace, we have decided to stand down from Friday’s launch attempt of the #Starliner Orbital Flight Test-2 mission: go.nasa.gov/2V64ifL

LIVE NOW: @NASAInterns share tips for joining our NASA family on #NationalInternDay. Tune in to learn about their experiences contributing to mission success and ask questions using #AskNASA: twitter.com/i/broadcasts/1…

ICYMI: Earlier today, the Russian Nauka module inadvertently fired its thrusters while docked to the @Space_Station. Mission Control teams corrected the action and all systems are operating normally. The crew was never in any danger. Stay tuned for a media telecon later today:

.@Space_Station crew members are safe and will scrub their schedules for today in order to focus on recovery efforts following the unexpected loss of attitude caused by the Russian Nauka module's thrusters firing. The station is back in attitude control and is in good shape.

Following this morning's docking of the Nauka module to the @Space_Station, the module's thrusters started firing at 12:45pm ET inadvertently and unexpectedly, moving the station 45 degrees out of attitude. Recovery operations have regained attitude and the crew is in no danger:

Live: From Mission Control at @NASA_Johnson, an update on the @Space_Station following this morning's docking of the Russian Nauka module: nasa.gov/live twitter.com/i/broadcasts/1…

It's #NationalInternDay! Learn about interns' contributions to our missions & how to apply: intern.nasa.gov Today: ⭐ 3pm ET (19:00 UT): Watch #ScienceLive on How to Become a NASA Intern: nasa.gov/live ⭐ 4pm ET (20:00 UT): Ask @NASAInterns anything on @Reddit