Saturday, January 23, 2021

Mysterious radio wave from space perplexes scientists

The possible existence of extraterrestrial "alien" life is always exciting to think about. Scientists in search of extraterrestrial life are now studying a mysterious radio wave coming from Proxima Centauri, the star closest to the Sun.

Proxima Centauri is a really small, low-mass star located 4.2465 light-years (1.3020 pc) away from the Sun in the southern constellation of Centaurus. Its Latin name means the "nearest [star] of Centaurus". This interesting object was discovered in 1915 by Robert Innes and is the nearest-known star to the Sun. With a quiescent apparent magnitude 11.13, it is too faint to be seen with the unaided eye. Proxima Centauri is a member of the Alpha Centauri system, being identified as component Alpha Centauri C, and is 2.18° to the southwest of the Alpha Centauri AB pair. It is currently 12,950 AU (0.2 ly) from AB, which it orbits with a period of about 550,000 years.

Proxima Centauri is a red dwarf star with a mass about an 8th of the Sun's mass (M☉), and average density about 33 times that of the Sun.

Because of Proxima Centauri's proximity to Earth, its angular diameter can be measured directly. Its actual diameter is about one-seventh the diameter of the Sun.

Mysterious signals sometimes come from space.

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