Ad
related to: echo astronomy test 3 quizlet exam
Search results
Results From The WOW.Com Content Network
Radar astronomy is a technique of observing nearby astronomical objects by reflecting radio waves or microwaves off target objects and analyzing their reflections. Radar astronomy differs from radio astronomy in that the latter is a passive observation (i.e., receiving only) and the former an active one (transmitting and receiving).
An echo of ShaSS 073 galaxy's light detected by ESO's VLT Survey Telescope. The ShaSS 622-073 system is composed of the larger galaxy ShaSS 073 (seen in yellow in the image on the right) and the smaller galaxy ShaSS 622 (seen in blue) that are at the very beginning of a merger.
The use of the Doppler effect in astronomy depends on knowledge of precise frequencies of discrete lines in the spectra of stars. Among the nearby stars , the largest radial velocities with respect to the Sun are +308 km/s ( BD-15°4041 , also known as LHS 52, 81.7 light-years away) and −260 km/s ( Woolley 9722 , also known as Wolf 1106 and ...
A-type star In the Harvard spectral classification system, a class of main-sequence star having spectra dominated by Balmer absorption lines of hydrogen. Stars of spectral class A are typically blue-white or white in color, measure between 1.4 and 2.1 times the mass of the Sun, and have surface temperatures of 7,600–10,000 kelvin.
Radio astronomy is a subfield of astronomy that studies celestial objects at radio frequencies. The first detection of radio waves from an astronomical object was in 1933, when Karl Jansky at Bell Telephone Laboratories reported radiation coming from the Milky Way .
The Cosmic Background Explorer (COBE / ˈ k oʊ b i / KOH-bee), also referred to as Explorer 66, was a NASA satellite dedicated to cosmology, which operated from 1989 to 1993.Its goals were to investigate the cosmic microwave background radiation (CMB or CMBR) of the universe and provide measurements that would help shape the understanding of the cosmos.
Samuel Birley Rowbotham (/ ˈ r oʊ b ɒ t ə m /; [1] 1816 – 23 December 1884, in London) was an English inventor, writer, utopian socialist [2] and flat Earther who wrote Zetetic Astronomy: Earth Not a Globe under the pseudonym Parallax. His work was originally published as a 16-page pamphlet (1849), and later expanded into a book (1865).
Visible-light astronomy has existed as long as people have been looking up at the night sky, although it has since improved in its observational capabilities since the invention of the telescope, which is commonly credited to Hans Lippershey, a German-Dutch spectacle-maker, [1] although Galileo played a large role in the development and ...