Circumstellar disc
Videos
A circumstellar disc is a torus-, pancake- or ring-shaped accretion disk of matter composed of gas, dust, planetesimals, asteroids, or collision fragments in orbit around a star. Around the youngest s
Circumstellar discs HD 141943 and HD 191089. The bottom images are illustrations of above real images.
Illustration of the dynamics of a proplyd
Artist's impression of a transitional disc around a young star.
The edge-on circumsecondary disk around HK Tauri B (bottom), imaged with Hubble Space Telescope. The primary HK Tauri A (star in the middle) is also surrounded by a disk.
Accretion disk
Videos
An accretion disk is a structure formed by diffuse material in orbital motion around a massive central body. The central body is most frequently a star. Friction, uneven irradiance, magnetohydrodynami
The hot accretion disk of a black hole, showing the relativistic effects imposed on light when it is emitted in regions subject to extreme gravitation. This image is the result of NASA simulations and shows a view from outside the horizon of a Schwarzschild black hole.
Artist's view of a star with accretion disk (2013)
Artist's conception of a black hole drawing matter from a nearby star, forming an accretion disk
HH-30, a Herbig–Haro object surrounded by an accretion disk