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)
White Dwarf
Star Classification: D
Luminosity Classification: D
Temperature (K) : 8000
Mass: Generally 0.15–1.4 M☉ (up to the Chandrasekhar Limit).
Elemental Composition: Carbon, Oxygen, Helium
Description: Compact stellar remnants supported by electron degeneracy, faint and slowly cooling.
Birth: Remnant core of a low–medium mass star.
Life: Remnant core of a low–medium mass star.
☠️ Death: Fades into a black dwarf
Reincarnation: Black dwarf (eventually)
Example: Sirius B, Procyon B
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)
