Facts about Red Dwarf Stars
- 09
The smallest red dwarf stars have masses around 0.08 solar masses, barely massive enough to sustain hydrogen fusion and distinguishing them from brown dwarfs below this threshold.
- 08
M-dwarfs emit most of their energy in infrared wavelengths rather than visible light, making them invisible to the naked eye despite being the most abundant stars in our galaxy.
- 07
Within 50 billion years, red dwarfs will become the longest-lived stars in the universe as more massive stars exhaust their fuel and fade away.
- 06
Observations from the Kepler Space Telescope indicate that red dwarfs host more Earth-sized planets than any other star type, with an estimated one planet per red dwarf star on average.
- 05
Stellar flares from red dwarfs can increase their brightness by up to 40 percent in just seconds, potentially sterilizing any nearby planetary atmospheres.
- 04
Habitable zones around red dwarf stars are located much closer to the star than Earth's orbit around the Sun, within 0.1 to 0.2 astronomical units.
- 03
Red dwarfs comprise approximately 73 percent of all stars in the Milky Way galaxy, making them by far the most common stellar type in the universe.
- 02
A red dwarf's core temperature of approximately 3 million Kelvin allows hydrogen fusion to occur at an extremely slow rate, enabling these stars to burn fuel for over 100 billion years.
- 01
Proxima Centauri, the nearest star to our Sun at 4.24 light-years away, is a red dwarf with only 12 percent of the Sun's mass.