Search results
Results from the WOW.Com Content Network
Calcium-rich supernovae are a rare type of very fast supernova with unusually strong calcium lines in their spectra. [69] [70] Models suggest they occur when material is accreted from a helium-rich companion rather than a hydrogen-rich star. Because of helium lines in their spectra, they can resemble type Ib supernovae, but are thought to have ...
A Type II supernova or SNII [1] (plural: supernovae) results from the rapid collapse and violent explosion of a massive star. A star must have at least eight times, but no more than 40 to 50 times, the mass of the Sun ( M ☉ ) to undergo this type of explosion. [ 2 ]
The Crab Nebula is a pulsar wind nebula associated with the 1054 supernova.It is located about 6,500 light-years from the Earth. [1]A near-Earth supernova is an explosion resulting from the death of a star that occurs close enough to the Earth (roughly less than 10 to 300 parsecs [30 to 1000 light-years] away [2]) to have noticeable effects on Earth's biosphere.
Insets at lower right show one epoch of Webb observations, while the inset at left shows a Webb image of the central supernova remnant released in 2023. "Even as a star dies, its light endures ...
But while supernovas occur only once, a nova can happen again and again. After a nova explosion, the dwarf star remains intact, and the cycle triggering another explosion starts over, which NASA ...
The electromagnetic energy released by these events varies from comparable to other type Ic supernova, to some of the most luminous supernovae known such as SN 1999as. [ 13 ] [ 14 ] The archetypal hypernova, SN 1998bw, was associated with GRB 980425 .
Collisions of solitary stars within the Milky Way occur only once every 10 7 to 10 13 years; far less frequently than the appearance of novae. [25] Collisions occur with greater frequency in the dense core regions of globular clusters [26] (cf. blue stragglers). A likely scenario is a collision with a binary star system, or between two binary ...
Type Ia supernova: SN 1997ff: z=1.7 Its distance was determined in 2001. [5] [6] [7] Type Ia supernova: Supernova Primo: z=1.55 [8] See also. List of largest cosmic ...