538

1291

128

 

NGC 6823 star cluster, NASA APOD, 8 October 2014

6745

0

273661

18854

13920

12778

147


CHRISTTO & ANDREW

296551


Kid gets a banana as a prank gift from his parents on his birthday. Look at his excitement. This kid is my hero. 

26127

1361

5067

mrcheyl:

Shock Diamonds are a formation of standing wave patterns that appears in the supersonic exhaust plume of an aerospace propulsion system, such as a supersonic jet engine, rocket, ramjet, or scramjet, when it is operated in an atmosphere. The diamonds are formed from a complex flow field and are visible due to the ignition of excess fuel. They form when the supersonic exhaust from a nozzle is slightly over or under-expanded, meaning that the pressure of the gases exiting the nozzle is different from the ambient air pressure. [x] [x]
Wolfe Air Reel [x]

8