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Galaxies are wheeling.

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Planets are falling into their orbits.

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If we create a generation ship right now, we can reach  Proxima b in 6300 years with the speed of 200 km/s.

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Proxima b is the closest known, potentially habitable planet.

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With an initial crew of 32, inbreeding is  inevitable in a generation ship . They would not be a genetically healthy crew to start an interstellar colony.If only females are sent along with frozen male sperms and only females are allowed to be born then crew size can be reduced dramatically.
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Proxima Centauri may be passing through the system, or it may be gravitationally bound to the binary pair.

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Proxima b is an Earth-sized rocky planet in the Proxima Centauri’s habitable zone.
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A planet is tidally locked, if it always shows the same face to its host star.

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The Moon is tidally locked to the Earth. The moon shows only one face to Earth.
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Tidal locking is caused by two bodies in synchronous rotation.
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In synchronous rotation , a body has the same rotational period as its orbital period around a partner.

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Proxima Centauri is a red dwarf about seven times smaller than the sun.

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Our sun is about 4.6 billion years old.
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The UV levels, even for the planets around the most active stars, were all lower than the Earth experienced in its youth. So multiple star systems might host life.
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The first lifeforms on Earth emerged a billion years after the planet formed.
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A few billion years ago on Earth ,  single-celled prokaryotes lived with high UV radiation levels.
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It is interesting to speculate that a tidal-locked planet might be ‘sheltered’ for life.
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Proxima Centauri is a part of the Alpha Centauri star system.

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Proxima Centauri is a red dwarf star.
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Proxima Centauri  is our second nearest star.

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A constellation is a configuration of stars as seen from the earth.

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Alpha Centauri star (A and B) system is located in the constellation of Centaurus.
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Red dwarfs like  Proxima Centauri are too faint to be observable with the naked eye.

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Proxima Centauri’s  closest neighbors are Alpha Centauri A and B .
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Though Proxima is called Alpha Centauri C, it may not be in orbit.

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The fastest man-made spacecraft, the Helios II deep space probe, has the speed  of 70.2 km/s.
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Even at that speed of Helios II, the journey to Proxima Centauri would take 18,000 years— beyond the current lifespan of both man and machine.

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Future interstellar travel might be possible with generation ships, laser-pushed solar sails, nuclear fusion powered Bussard ramjets, nuclear pulse drives or warp drives.

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The Closest Star to the Sun, Proxima Centauri, has a Planet in the Habitable Zone. Between Proxima Centauri’s variability and the planet being tidally-locked with its star, life would have a hard time surviving on Proxima b.
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Red dwarfs are the most common type of star in the Universe.
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85% of the stars in the Milky Way are red dwarf.

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Rocky planets with potential habitability have mostly been discovered around red dwarf stars – such as Proxima b, Ross 128b, LHS 1140b, Gliese 667Cc, GJ 536, the seven rocky planets orbiting TRAPPIST-1.

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Red dwarfs might not host life due to

regular stellar flares  bathing  planets in high levels of biologically harmful radiation.

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4 billion years ago, Earth’s surface was exposed to volcanic activities,  toxic atmosphere and UV radiation.
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Roughly half of all stars are in binary systems.

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Roughly half of all stars are solitary, like the Sun.
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The more massive a star is, the more luminous it is.

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In a binary star system, one star traces out an elliptical path relative to the other.
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When a cool star is in front of a hot star , there will be a large drop in apparent brightness. When the hot star is in front of the cool star, there will be a smaller drop in brightness.

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A star system or stellar system is a small number of stars  orbitting each other, bound by gravitational attraction.

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A large number of stars bound by gravitation is generally called a star cluster or galaxy.
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A star system of two stars is known as a binary star, binary star system or physical double star.

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A multiple star system consists of three or more stars.
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Most multiple star systems are triple stars.
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Trapezia are usually very young, unstable systems that quickly fragment into stable multiple stars.
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Eeeee

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Stars at the galaxy center have a shorter orbital period than those farther out.
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The Sun has orbited the galaxy, more than 20 times.

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The Sun is moving in five ways. The movements of the sunspots indicate that the sun rotates once every 27 days at its equator. The Sun takes a cosmic year(225 million years) to make one complete orbit around the Milky Way. The Sun moves up and down during it’s galactic rotation just like a carrousel. The Sun as the part of the Milky Way Galaxy moves towards the  Andromeda Galaxy at 100 kilometres per second. The Sun as the part of local galaxy group  moves towards the Virgo cluster.

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