The Vela Supernova Remnant is a supernova remnant in the southern constellation Vela. Its source supernova exploded 100-120,000 years ago. In astronomy, diffuse nebulae is the common term for both reflection nebulae and emission nebulae. ... In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... Right ascension (RA; symbol α: Greek letter alpha; celestial longitude) is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. ... In astronomy, declination (dec) is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. ... A light year, abbreviated ly, is the distance light travels in one year: roughly 9. ... The apparent magnitude (m) of a star, planet or other celestial body is a measure of its apparent brightness as seen by an observer on Earth. ... A degree (in full, a degree of arc, arc degree, or arcdegree), usually symbolized °, is a measurement of plane angle, representing 1／360 of a full rotation. ... Orion is a remarkable constellation, visible from most places on the globe at one time or another during the year. ... Vela (Latin for sails) is a southern constellation, one of the four parts into which Argo Navis was split (the others being; Carina (constellation), Puppis and Pyxis. ... In classical geometry, a radius of a circle or sphere is any line segment with one endpoint on the circle (i. ... In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standard luminosity distance away from us. ... Remnant of Keplers Supernova, SN 1604. ... Vela (Latin for sails) is a southern constellation, one of the four parts into which Argo Navis was split (the others being; Carina (constellation), Puppis and Pyxis. ... Multiwavelength X-ray image of the remnant of Keplers Supernova, SN 1604. ...

Includes NGC 6955, IC 1340 and IC 1340.

External Links

• http://antwrp.gsfc.nasa.gov/apod/ap960612.html
• http://www.aao.gov.au/images/captions/uks002.html
• http://antwrp.gsfc.nasa.gov/apod/ap970713.html
• http://www.thunderbolts.info/tpod/2004/arch/040920pulsar.htm
• http://astro.nineplanets.org/twn/velax.html