Star Catalogue by Andrew Carbajal

Nebulae

acarba01 — 2024-09-17 16:52:36 UTC

Nebulae are made of dust and gases—mostly hydrogen and helium

acarba01 — 2024-09-17 16:55:48 UTC

Planetary nebulae are short-lived, lasting only about 20,000 years

acarba01 — 2024-09-17 16:58:31 UTC

They are the source of much of the energy that heats up the interstellar medium

acarba01 — 2024-09-17 17:00:43 UTC

Diffuse nebulae are often associated with star formation regions

acarba01 — 2024-09-17 17:02:19 UTC

It can be used to chart the life cycle of a star.

acarba01 — 2024-09-17 17:04:24 UTC

Represents the stable, "normal" phase of a star's life

acarba01 — 2024-09-17 17:07:22 UTC

Have extremely high temperatures but low luminosity, high mass, and small size.

acarba01 — 2024-09-17 17:11:34 UTC

Lifetimes are probably only a few million years, extremely short on the scale of stellar evolution

acarba01 — 2024-09-17 17:13:15 UTC

They lie above the main sequence on the Hertzsprung–Russell diagram

acarba01 — 2024-09-17 17:14:41 UTC

Stars that become novas are nearly always too faint before eruption to be seen with the unaided eye.

acarba01 — 2024-09-17 17:15:48 UTC

Supernovas are the biggest explosions in the universe, and can be brighter than an entire galaxy.

acarba01 — 2024-09-17 17:17:39 UTC

You Can't Directly See a Black Hole