Ad Astra
M☉ Notation
Unit of measurement in
astronomy called the solar mass.
- M stands for Mass
- ☉ Astronomical Symbol/Sun
- 1 M☉, Benchmark unit
- Equal to mass of our Sun
The Sun
(NASA/ESA)
Spirograph Nebula
(NASA/ESA)
Hourglass Nebula
(NASA/ESA)
L-Type Brown Dwarf
Star Classification: L
Luminosity Classification: V
Temperature (K) : 1800
Mass: 14–78.5 Jupiter masses, or below 0.075 M☉
Elemental Composition: Metal hydrides, alkali metals
Description: Cool substellar objects not massive enough for sustained hydrogen fusion.
Birth: Failed star(harsh); insufficient mass for hydrogen fusion
Life: Cool, dusty atmosphere
☠️ Death: Slowly cools indefinitely
Reincarnation: None(from harsh to even worse)
Example: 2MASS J1507−1627
Luminosity Classes
Added to spectral types.
Indicates size & brightness:
- 0 or Ia+: Hypergiants
- I (Ia, Ib): Supergiants
- II: Bright Giants
- III: Regular Giants
- IV:Subgiants
- V: Main Sequence
- VI (sd): Subdwarfs
- D (VII): White Dwarfs
Galaxy in Orange
(Wiki Images)
Wolf-Rayet Star
(NASA/ESA)
Planetary Nebula (PN K 4-55)
(NASA/ESA)
