NGC 1559 is a

barred spiral galaxy A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure composed of stars. Bars are found in about two thirds of all spiral galaxies, and generally affect both the motions of stars and interstellar gas within spiral galaxi ...

in the

constellation A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object. The origins of the e ...

Reticulum Reticulum is a small, faint constellation in the southern sky. Its name is Latin for a small net, or reticle—a net of crosshairs at the focus of a telescope eyepiece that is used to measure star positions. The constellation is best viewed bet ...

. It is also a

Seyfert galaxy Seyfert galaxies are one of the two largest groups of active galaxies, along with quasars. They have quasar-like nuclei (very luminous, distant and bright sources of electromagnetic radiation) with very high surface brightnesses whose spectra ...

. Although it was originally thought to be a member of the

Dorado Group The Dorado Group is a loose concentration of galaxies containing both spirals and ellipticals. It is generally considered a 'galaxy group' but may approach the size of a 'galaxy cluster'. It lies primarily in the southern constellation Dorado a ...

, subsequent observations have shown that it is in fact not a member of any galaxy group or cluster and does not have any nearby companions. NGC 1559 has massive spiral arms and strong

star formation Star formation is the process by which dense regions within molecular clouds in The "medium" is present further soon.-->interstellar space

. It contains a small bar which is oriented nearly east-west and spans 40. Its bar and disc are the source of very strong radio emissions. Four

supernova A supernova is a powerful and luminous explosion of a star. It has the plural form supernovae or supernovas, and is abbreviated SN or SNe. This transient astronomical event occurs during the last evolutionary stages of a massive star or when ...

e have been observed in NGC 1559.

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

amateur astronomer Amateur astronomy is a hobby where participants enjoy observing or imaging celestial objects in the sky using the unaided eye, binoculars, or telescopes. Even though scientific research may not be their primary goal, some amateur astronomers m ...

Robert Evans Robert Evans (born Robert J. Shapera; June 29, 1930October 26, 2019) was an American film producer, studio executive, and actor, best known for his work on '' Rosemary's Baby'' (1968), '' Love Story'' (1970), ''The Godfather'' (1972), and ''Chi ...

discovered the first three: SN 1984J ( type II, mag. 13.5), SN 1986L (type II, mag. 13.5), and

SN 2005df SN 2005df was a Type Ia supernova in the barred spiral galaxy NGC 1559, which is located in the southern constellation of Reticulum. The event was discovered in Australia by Robert Evans on the early morning of August 5, 2005 with a 13.8 magnitud ...

( Type Ia, mag 12.3). SN 2009ib (type IIP, mag. 14.7)Transient Name Server entry for SN 2009ib.
Retrieved 25 March 2023. was discovered on 6 August 2009. Supernova 2005dh and Spiral Galaxy NGC 1559

Supernova 2005dh and Spiral Galaxy NGC 1559

References

External links

* 14814

1559 Year 1559 ( MDLIX) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. Events January–June * January 15 – Elizabeth I of England is crowned, in Westminster Abbey. * February 27 ...

Reticulum Barred spiral galaxies Seyfert galaxies {{spiral-galaxy-stub