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Astrophysics, Cosmology & Relativity

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Astrophysics, Cosmology & Relativity

Nebula

An interstellar cloud of dust, hydrogen, helium, and ionized gases in space, serving as a site for star formation.

M_Jeans = (5 k_B T / (G μ m_H))^(3/2) (3 / (4 π ρ))^(1/2) Light-Years (Diameter) Astrophysics, Cosmology & Relativity

Neutron Star

An ultradense stellar core remnant produced by the core-collapse supernova explosion of a massive star, composed almost entirely of…

M ≈ 1.4–2.1 M_☉, R ≈ 10–12 km, ρ ≈ 10¹⁷ kg/m³ M_☉ (Mass), km (Radius)