Space communications satellite in low orbit around the Earth.
Astronomy

Magnetosphere: Satellites, Space Debris, and What Else?

July 10, 2020

Without the magnetosphere, the Earth’s atmosphere would have been destroyed by the solar wind long ago. It stretches way beyond satellites’ reach, and is affected both by the Earth and the Sun. It protects humans, living on both Earth and in space, from the high-energy particles. […]

Depiction of the Big Bang and the expansion of the universe.
Astronomy

Dark Energy: The Mysterious Driver of the Universe

June 29, 2020

The turn of the 21st century led to a series of scientific breakthroughs, including the discovery of dark energy, the mysterious energy which drives the speeding expansion of the universe. Read on to find more. […]

Artist's impression of a time loop. Closed timelike curves allow a material particle to traverse spacetime and return to its starting point.
History of Science

Do Closed Timelike Curves Exist or Not?

May 15, 2020

A number of solutions to the field equations have shown that closed timelike curves can exist. However, there’s still uncertainty regarding the existence of closed timelike curves. Why is this the case? […]

Aerial view of the Institute for Advanced Study at Princeton campus. Kurt Gödel took up a position here after fleeing Nazi Germany in 1940.
History of Science

Kurt Gödel Wanted to Revise Our Concept of Time

May 15, 2020

Kurt Gödel thought he had found certain logical inconsistencies with the concept of time, as we know it. So, what was time like in Godel’s cosmological solution and what was the nature of Godel’s universe? […]

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