I’ve yet a few more promising star systems to research, but let’s split the post in two. So, without further ado…
Alpha Centauri
- 4,37 light years away
- three star system, Alpha Centauri A and B and Proxima Centauri
- Alpha Centauri A has 110% mass and 151,9% luminosity of the Sun, yellow in color
- B has 90,7% mass and 44,5% luminosity, orange in color
- Proxima Centauri is a red dwarf
- Slightly older than the Sun, 4,5-7 billion years
- planets:
- Alpha Centauri B has one planet, 20,4 day orbit time; too close for life. Possibility of other planets in the habitable zone (0,5-0,9 AU)
Barnard’s Star
- 6 light years away
- low-mass red dwarf
- 7-12 billion years old
- 0,14 solar mass, 15-20% of the Sun’s radius
- planets in the habitable zone would be very close to the star and suffer from solar flares etc.
Sirius
- 6 light years away
- consists of Sirius A and B
- A is about twice the size of the Sun
- B is a white dwarf
- 2-300 million years old
- orbit each other in 50,1 years
- no confirmed planets
Epsilon Eridani
- 10,5 light years away
- at least one giant planet in orbit, 2 asteroid belts. May have another planet within a dust belt
- 82% of the Sun’s mass, 74% of the Sun’s radius, 34% luminosity
- presence of a large planet at a close proximity to the star makes finding a planet in the habitable zone (0,5-1,4 AU) unlikely
Tau Ceti
- 78% of the Sun’s mass, 79,5% radius, 55% luminosity
- planets:
- possibly five in orbit, all larger than Earth
- orbit periods 14-640 days
- two of those in the habitable zone
- debris risk about ten times greater than in our solar system, makes life unlikely in the system
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