The Sun could have been created from the collapse of a nebula over five billion years ago.More... A pulsar or neutron star could be at the heart of a supernova remnant nebula. The plural form of Nebula is Nebulae, but some people accept Nebulas. ...
astronomer Milton Humason. Humason measured the redshift of spiral galaxies. Hubble and Humason then studied Cepheid stars in those galaxies, using the stars to determine the distance of their galaxies (or nebulae, as they called them). They compared the distances of ...
Nebulae are small fuzzy patches you see in the sky, they look like little clouds.Many of them have a spiral shape, and that's why we called them spiral nebulae.So astronomers in the eighteenth century, eighteenth century, when they looked through the telescope, they could see planets-and ...
Stargazers might like to try the venerableWebb Deep-Sky Society's Visual Atlas of the Magellanic Clouds, which is a guide to deep-sky objects such as emission nebulae, planetary nebulae, dark nebulae and star clusters in the Magellanic Clouds. To keep up to date with the latest research and...
The DGM is comparable to other good filters on most nebulae, but has given me superb views of the large H-II star forming regions (M8/M20/M17,M16 for example). #30 Starman1 Stargeezer Posts:69,623 Joined:23 Jun 2003 Loc:Los Angeles ...
the idea that "nebulae" could be "island universes" like our Milky Way was considered rejected by all leading authorities. With the acceptance of the spiral galaxies, the theory that solar systems are formed by collapsing, spiral nebulae was then rejected in favor of a "tidal" theory that pa...
A phase could be as short as 24 minutes (near the equator) or several weeks (near the poles). At mid-latitudes, it can last anywhere from a half hour (fall to spring months) to one hour (summer months). For mid-latitudes, the Sun is at a lower angle with the horizon, so twiligh...
(It also will lack some of Hubble's fine spectral resolution, and ability to observe a special spectral line called H-alpha that is useful for nebulae and stars.) You may like Can Hubble still hang? How the space telescope compares to its successors after 35 years of cosmic adventures ...
whole galaxy. Supernovae leave their mark on the skies as nebulae, clouds of solar debris that make for many of the most iconic astronomical images ever captured. Supernovae can give birth to black holes and neutron stars, and their light can be observed from thousands of light years away...
Emission nebulae are often star-forming regions, and are being ionized by the hard ultraviolet light from the young, massive stars born within them. Radioactive decay Not all atoms are stable. Some isotopes are unstable and will spontaneously decay. There are several types of decay. One is ...