Black Hole Comic Eliza

A black hole is a region of spacetime exhibiting gravitational acceleration so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. The boundary of the region from which no escape is […]

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Space Shuttle Carries

The Space Shuttle was a partially reusable low Earth orbital spacecraft system that was operated from 1981 to 2011 by the U. S. National Aeronautics and Space Administration (NASA) as part of the Space Shuttle program. Its official program name was Space Transportation System (STS), taken from a 1969 plan for a system of reusable […]

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Asteroid Apophis Size

99942 Apophis (/əˈpɒfɪs/, previously known by its provisional designation 2004 MN4) is a 370-metre-diameter near-Earth asteroid that caused a brief period of concern in December 2004 because initial observations indicated a probability of up to 2. 7% that it would hit Earth on April 13, 2029. Additional observations provided improved predictions that eliminated the possibility of […]

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