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SN 1988Z was a prototypical [2] type IIn supernova event in the equatorial constellation of Leo. The apparent host is an irregular galaxy with the designation MCG +03-28-22. [1] It has a redshift of z equal to 0.0225. [1] This was a very luminous supernova that faded unusually slowly and has remained detectable three decades after the event.
G299.2-2.9 is a supernova remnant in the Milky Way, 16,000 light years from Earth. [2] It is the remains of a Type Ia supernova . [ 3 ] The observed radius of the remnant shell translates to approximately 4,500 years of expansion, [ 4 ] making it one of the oldest observed Type Ia supernova remnants.
A probability calculation predicts the rate of stellar collisions involving the Sun is 1 in 10 28 years. [14] For comparison, the age of the universe is of the order 10 10 years. The likelihood of close encounters with the Sun is also small. The rate is estimated by the formula: N ≈ 4.2 · D 2 Myr −1
Type Ia supernova events occur when a white dwarf star accretes enough additional matter to exceed the Chandrasekhar limit and collapses, triggering runaway fusion and a supernova explosion. Because this collapse happens at a consistent mass, the resulting explosions have very uniform characteristics, and are used as " standard candles " to ...
SN 1054 remnant (Crab Nebula)A supernova is an event in which a star destroys itself in an explosion which can briefly become as luminous as an entire galaxy.This list of supernovae of historical significance includes events that were observed prior to the development of photography, and individual events that have been the subject of a scientific paper that contributed to supernova theory.
The supernova progenitor was a white dwarf star, the progenitor of all Type Ia supernovae. The gravitational lens is galaxy cluster PLCK G165.7+67.0 (at a redshift of z=0.35), which lensed the supernova and its host galaxy. [5] [6] The determination for the Hubble Constant (H 0) using this Type Ia supernova was 75.4 kilometers per second per ...
SN 2021aefx was discovered on November 11, 2021, by the Distance Less Than 40 Mpc (DLT40) transient survey in the spiral galaxy NGC 1566 at a distance of 17.69 ± 2.02 Mpc. [1] It is located 61.2″ west and 36.5″ south of the center. [2] It was discovered at apparent magnitude of 17.24 and classified as a high-velocity SN Type Ia. [3]
Calamity James, a British comic book character from The Beano; Calamity Jane, a 1953 film based on the person; Calamity Town, a 1942 novel by Ellery Queen; The Calamity, a central plot point for the 2011 video game Bastion; Calamity, a mod for the 2011 video game Terraria "Calamity", a song by Zayn from his 2021 album Nobody Is Listening