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The objects emitted large amounts of radiation of many frequencies, but no source could be located optically, or in some cases only a faint and point-like object somewhat like a distant star. The spectral lines of these objects, which identify the chemical elements of which the object is composed, were also extremely strange and defied explanation.
Half the stars concentrate within inner core with an effective radius of 330 light-years (100 pc). [ 7 ] [ 8 ] Densities in the central stellar cusp increase steeply, exceeding 3×10 7 (that is, 30 million) M ☉ pc −3 (that is, per parsec cubed) at the smallest sub-radii resolved by Hubble Space Telescope , [ 9 ] and the half-light radius of ...
Galaxies, averaging an estimated 100 million stars, [3] range in size from dwarfs with less than a thousand stars, [4] to the largest galaxies known – supergiants with one hundred trillion stars, each orbiting its galaxy's centre of mass. Most of the mass in a typical galaxy is in the form of dark matter, with only a few per cent of that mass ...
It has a spectral type of A1 V [1] and is an optical double star. Beta Lacertae is far dimmer, a yellow giant of magnitude 4.4, 170 light-years from Earth. [2] Roe 47 is a multiple star consisting of five components (magnitudes 5.8, 9.8, 10.1, 9.4, 9.8). ADS 16402 is a binary star system in Lacerta, around which a planet orbits with some ...
The star has swollen to about 55 times the Sun's radius and is emitting roughly 673 times the luminosity of the Sun. The stellar atmosphere has cooled, giving it a surface temperature of 3,880 K. [14] The only star with a proper name is Alsciaukat (from the Arabic for thorn), also known as 31 Lyncis, located 380 ± 10 light-years from Earth. [12]
The post 20 Cool Facts About Space We Bet You Didn’t Know appeared first on Reader's Digest. Who knows, one day you might be able to actually visit! The post 20 Cool Facts About Space We Bet You ...
The new spectral types L, T, and Y were created to classify infrared spectra of cool stars. This includes both red dwarfs and brown dwarfs that are very faint in the visible spectrum. [96] Brown dwarfs, stars that do not undergo hydrogen fusion, cool as they age and so progress to later spectral types. Brown dwarfs start their lives with M-type ...
Monoceros contains only a few fourth magnitude stars, making it difficult to see with the naked eye. Alpha Monocerotis has a visual magnitude of 3.93, while for Gamma Monocerotis it is 3.98. Beta Monocerotis is a triple star system; the three stars form a fixed triangle. The visual magnitudes of the stars are 4.7, 5.2, and 6.1.