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Tyler Gray Profile picture
Tyler Gray
@TylerG1998
Writer & reporter for @NASASpaceflight. Rocketry, astronomy, & racing nerd. Discovery is best Shuttle, and SN15 is best Starship - don’t @ me.
Feb 15, 2022 • 14 tweets • 4 min read
9 years ago - February 15, 2013.

An asteroid fell through the Earth’s atmosphere over the Chelyabinsk Oblast in southern Russia, resulting in a meteor air burst that created sonic booms and a bright flash that rivaled the then-rising Sun. (1/14)

📸: Alex Alishevskikh Image Analysis and estimates state the object measured in at approximately 20m across and weighed in at around 10,000 tons.

It entered the atmosphere at a shallow 18° angle, with a relative velocity of ~69,000 km/h/42,700 mph - just over 11 miles per second. (2/14)
Feb 14, 2022 • 5 tweets • 5 min read
Elon Musk had hinted at some exciting announcements during his #Starship update on Thursday - I think we’ve got the first of many!

#Polaris will partner with #SpaceX for 3 human spaceflight missions, with 2 Crew Dragon flights coming before the first crewed Starship mission. There’s more:

The first mission, #Polaris Dawn, will launch NET Q4 of this year, taking advantage of Falcon 9’s and Dragon’s full capabilities. The mission will culminate in an attempt at the first-ever commercial spacewalk, using a special #SpaceX EVA suit.

📸: SpaceX/Polaris