Space start at the Karman Line (100 km altitude)

Where Does Space Actually Start?

The Fédération Aéronautique Internationale has demarcated the Karman Line - which lies at an altitude of 100 kilometers (330,000 feet; 62 miles) above the Earth's sea level - as the boundary where space begins. But, NASA spokesperson Dan Huot explains from a physical science’s perspective that “there is no hard-definable point where space begins; the atmosphere just gradually decreases the higher you get.”

Black hole explosion in v404 cygni

Black Hole Explosion In Binary Star System Creates Shooting Target

A team of astronomers led by Andrew Beardmore at the University of Leicester, U.K. have captured rings of X-ray light (resembling a shooting target) resulted due to black hole explosion in the centre of V404 Cygni, using the X-ray Telescope aboard NASA's Swift satellite. The team includes scientists from the Southampton, and Oxford in the U.K., … Continue reading Black Hole Explosion In Binary Star System Creates Shooting Target