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A knowledge platform for everything above Earth — astronomy, space, the night sky, celestial events, mythology, and astrology as a clearly separate cultural tradition.

Astronomy is presented as scientific, evidence-based, and sourced. Astrology is presented as cultural, symbolic, and interpretive — never as proven science.

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© 2026 Asteria Star. Everything above Earth — science and tradition, kept clearly apart.

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Learn Black Holes

Learning path

Learn Black Holes

Gravity at its most extreme — event horizons and the unseen.

Beginner

1.1What is a black hole?Where light cannot escape.
1.2How black holes workEvent horizons and growth.
1.3Explore black holesBlack holes in the graph.

Intermediate

2.1SupernovaeHow massive stars end.
2.2Chandra X-ray ObservatorySeeing the high-energy universe.
2.3Deep-sky objectsWhere black holes live.

Advanced

3.1PulsarsOther dense stellar remnants.
3.2QuasarsSupermassive black holes at work.
3.3GalaxiesBlack holes anchor galactic centers.

Related entities

Black hole
Sagittarius A*
The supermassive black hole at the center of the Milky Way, imaged by the Event Horizon Telescope in 2022.
Black hole
M87*
The supermassive black hole at the heart of galaxy M87, the first black hole ever directly imaged, in 2019.

Continue learning

Learn Galaxies →Learn Stars →