OrionNebula_ZH-CN10007648454_1920x1080.jpg 2017年10月09日14:08:49 Oct 11, 2017 OrkneyIslands_ZH-CN7226700281_1920x1080.jpg 2018年1月16日15:27:14 Jan 16, 2018 PeabodyLibrary_ZH-CN9475175779_1920x1080.jpg 2017年9月15日14:40:47 Sep 15, 2017 ...
The horse-like feature is actually part of a larger nebula that lies 1,500 light years from the sun in the Orion constellation. Another image shows the bright red heart of V838 Monocerotis, a once-dull star that suddenly became 600,000 times more luminous than the sun. The rapid ...
. The most recent group to form is the 1d subgroup which represents the stars of the Orion Nebula and NGC 1977. There are over 1000 stars in the Orion Nebula cluster which range between 1 and 4 million years old and include the young trapezium cluster which illuminates M42....
of Mon R 2 are type B stars located along an east-west line stretching across 2 degrees of the winter sky, situated about 8 degrees east of the Orion Nebula. The Mon R 2 association resides at a distance of 830 pc and formed about 6 to 10 million years ago along the edge of the ...
A sunlike star ends its life as a Planetary Nebula. As the gravity of the dying red giant becomes weaker its outer envelope is expelled into space. The hot shrunken core releases abundant amounts of radiation which catch up to and collide with older winds released earlier by the dying star...
The optical component of this cavity has produced the "horseshoe" shape of M17, a description which has become one of its several monikers. The nebula is also the second brightest radio source in the sky (after Orion A). Radio wave surveys have detected water vapor in the form of "...