WikiVisually
Infinite photos and videos for every Wiki article · Find something interesting to watch in seconds
WikiVisually
Infinite photos and videos for every Wiki article · Find something interesting to watch in seconds
Nature The World Movies USA Top Art Fine & Rare History Ivy & Inquiry
Protoplanetary disk
Videos
A protoplanetary disk is a rotating circumstellar disc of dense gas and dust surrounding a young newly formed star, a T Tauri star, or Herbig Ae/Be star. The protoplanetary disk may also be considered an accretion disk for the star itself, because gases or other material may be falling from the inner edge of the disk onto the surface of the star. This process should not be confused with the accretion process thought to build up the planets themselves. Externally illuminated photo-evaporating protoplanetary disks are called proplyds.
Atacama Large Millimeter Array image of HL Tauri
Atacama Large Millimeter Array image of HL Tauri
A 2009 image showing fractions of stars that suggest some evidence of having a protoplanetary disk as a function of their stellar age in millions of y
A 2009 image showing fractions of stars that suggest some evidence of having a protoplanetary disk as a function of their stellar age in millions of years; The samples are nearby young clusters and associations.
Protoplanetary disk. Simulated spiral arm vs observational data.
Protoplanetary disk. Simulated spiral arm vs observational data.
An artist's illustration giving a simple overview of the main regions of a protoplanetary disk, delineated by the soot and frost line, which for examp
An artist's illustration giving a simple overview of the main regions of a protoplanetary disk, delineated by the soot and frost line, which for example has been observed around the star V883 Orionis.
Orion Nebula
Videos
The Orion Nebula is a diffuse nebula situated in the Milky Way, being south of Orion's Belt in the constellation of Orion,[b] and is known as the middle "star" in the "sword" of Orion. It is one of the brightest nebulae and is visible to the naked eye in the night sky with apparent magnitude 4.0. It is 1,344 ± 20 light-years (412.1 ± 6.1 pc) away and is the closest region of massive star formation to Earth. The M42 nebula is estimated to be 24 light-years across. It has a mass of about 2,000 times that of the Sun. Older texts frequently refer to the Orion Nebula as the Great Nebula in Orion or the Great Orion Nebula.
The entire Orion Nebula in a composite image of visible light and infrared; taken by Hubble Space Telescope in 2006
The entire Orion Nebula in a composite image of visible light and infrared; taken by Hubble Space Telescope in 2006
The constellation of Orion with the Orion Nebula (lower middle)
The constellation of Orion with the Orion Nebula (lower middle)
Messier's drawing of the Orion Nebula in his 1771 memoir, Mémoires de l'Académie Royale
Messier's drawing of the Orion Nebula in his 1771 memoir, Mémoires de l'Académie Royale
Henry Draper's 1880 photograph of the Orion Nebula, the first ever taken.
Henry Draper's 1880 photograph of the Orion Nebula, the first ever taken.