With this timeline, you can follow the Atlas 5 rocket’s 42-minute mission today to deploy the US Space Force’s SBIRS GEO 5 missile warning satellite and two secondary payloads for the Air Force Academy: spaceflightnow.com/2021/05/17/ twitter.com/SpaceflightNow/sta

In the early stages of today's countdown, ULA's team at the Atlas Spaceflight Operations Center a few miles from the Complex 41 launch pad have powered up the Atlas 5 rocket to begin testing the vehicle's guidance system.

Watch a live view of the pad: youtube.com/watch?v=JJk-oIMFvh twitter.com/SpaceflightNow/sta

The countdown just started for today’s Atlas 5 launch attempt at Cape Canaveral. Liftoff with the Space Force’s SBIRS GEO 5 satellilte is set for 1:31pm EDT (1731 GMT).

ULA says a bad temperature sensor caused yesterday’s launch scrub.

📷: @ulalaunch

spaceflightnow.com/2021/05/17/ twitter.com/SpaceflightNow/sta

Take your coding skills to the next level with the new Humble Python bundle!

It has e-books with a Hands-On Introduction but also Beyond the Basic Stuff with Best Practices for Writing Clean Code

Get 4 ebooks for only $1/€1 using our affiliate link:

humblebundle.com/books/learn-y twitter.com/universal_sci/stat

Amazing Hubble image shows 2 galaxies in the middle of a merger event, violently ripping material from each other twitter.com/universal_sci/stat

Minisforum's UM250 is a very small form factor PC with the power and the ports to take on a lot of tasks. And due to its choice of an older CPU, it's pretty cheap, too: sub-$500, even fully loaded. trib.al/WCMz08A twitter.com/arstechnica/status

While Stargazing on Mars, NASA's Curiosity Rover Spots Earth and Venus (June 5, 2020)

The planets appear as pinpoints of light owing to a combination of distance and dust in the air. Mars' Tower Butte is visible at bottom.

(Credit: NASA/JPL-Caltech/MSSS) twitter.com/universal_sci/stat

SCRUB. United Launch Alliance has declared a scrub for today’s Atlas 5 launch attempt after encountering a technical issue during fueling preparations.

ULA plans to try again tomorrow to launch the SBIRS GEO 5 military satellite.

spaceflightnow.com/2021/05/17/ twitter.com/SpaceflightNow/sta

New launch time! United Launch Alliance is now targeting liftoff of an Atlas 5 rocket from Cape Canaveral at 1:42pm EDT (1742 GMT).

This seven-minute delay was ordered to ensure the rocket does not get too close to another object already in orbit.

spaceflightnow.com/2021/05/17/ twitter.com/SpaceflightNow/sta

Members of United Launch Alliance’s team have authorized the loading of cryogenic liquid hydrogen and liquid oxygen propellants into the Atlas 5 rocket at Cape Canaveral.

Liftoff is set for 1:35pm EDT (1735 GMT) with the military’s SBIRS GEO 5 satellite.

spaceflightnow.com/2021/05/17/ twitter.com/SpaceflightNow/sta

The Atlas 5 countdown clock has resumed after a pre-planned 15-minute hold to verify all is ready to start filling the rocket with super-cold propellants.

Liftoff remains set for 1:35pm EDT (1735 GMT) with the SBIRS GEO 5 military satellite.

Coverage: spaceflightnow.com/2021/05/17/ twitter.com/SpaceflightNow/sta

Awesome: The HiRISE satellite took this amazing shot of the Perseverance rover parachuting down during its descent to Mars back in february

(Credit: NASA/JPL-Caltech/University of Arizona) twitter.com/universal_sci/stat

These photos show a 194-foot-tall United Launch Alliance Atlas 5 rocket standing on pad 41 at Cape Canaveral Space Force Station yesterday in advance of today's planned launch with the US Space Force’s fifth SBIRS missile warning satellite.

See more: spaceflightnow.com/2021/05/16/ twitter.com/SpaceflightNow/sta

Forecasters predict a 90% chance of favorable weather at Cape Canaveral for liftoff of a United Launch Alliance Atlas 5 rocket and a US military missile warning satellite during a 40-minute window opening at 1:35pm EDT (1735 GMT) Monday.

📷: @ulalaunch

spaceflightnow.com/2021/05/17/ twitter.com/SpaceflightNow/sta

United Launch Alliance is set to send the US military’s SBIRS GEO 5 early warning satellite into orbit with a launch at 1:35pm EDT (1735 GMT) on an Atlas 5 rocket from Cape Canaveral Space Force Station.

📷: @ulalaunch

Live coverage: spaceflightnow.com/2021/05/17/ twitter.com/SpaceflightNow/sta

Watch a replay of our interview with space station astronauts Shane Kimbrough and Megan McArthur. Find out about the ride aboard the Crew Dragon and what the astronauts think about more tourist and commercial spaceflights: youtu.be/iERJK8znhmI twitter.com/SpaceflightNow/sta

3C 397 is a fascinating supernova remnant that spans about 50 light years in width.

Its boxy shape was likely formed when heated remains of the exploded star crashed into the cooler gas in its surroundings

(Credit: NASA/JPL-Caltech/CXC/Univ of Manitoba/S.Safi-Harb et al.) twitter.com/universal_sci/stat

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