Big asteroid 1998 OR2 seen in radar imagery
01:03
Arecibo Observatory observed asteroid (52768) 1998 OR2 on April 18, 2020. The space rock’s closest approach to Earth will be about 3.9 million miles (6.3 million km) away on April 29.
[Big asteroid shows itself ahead of Earth flyby on April 29]
1998 OR has an estimated diameter of 1.1 to 2.5 miles (1.8 to 4.1 km). Credit: Arecibo
Observatory/NASA/NSF / mash mix by Space.com’s [Steve Spaleta](http://www.twitter.com/stevespaleta)
12:25 That’s not true: “from one in a million to nothing”, he forget on a interstellar asteroids, a objects can be hiden, there is a lot of space phenomenons for false measurement false positive false negative, hiden objects etc. True is that humans don’t have any technology for perfect observation and due to this the percentual chance for any impact growing every day really fast.
Why Moon base at first?
Moon is the testing field for a new technologies in unhabitable enviroments.
+ near by Earth
+ low gravity
+ perfect observe place (ready for ATLAS base,, etc.)
