Sentences with phrase «bright giant stars»
[9] The visible component shows the spectrum of an evolved K - type giant or bright giant star with a stellar classification of K0 II - III.
https://en.wikipedia.org/ Not exact matches
Or maybe, others said, the first stars were strange, short - lived and supermassive giants, far brighter and hundreds or even a thousand times more massive than our sun.
It is a giant star, one of the night sky's brightest and nearly 1,000 times the diameter of the sun, but so far away that it appears much smaller in the sky than Pluto.
The large, bright stars in the image are red giants.
Frebel used the Clay Magellan Telescope in the Chilean Andes to search the halo of the Milky Way — its outer reaches, where old stars lurk — and turned up a bright red giant about eight - tenths the mass of our sun, dubbed HE 1523 - 0901, that appeared to meet all the requirements.
Ness and her colleagues developed a computer program that analyzed the light emitted by red giants — bright stars that started out like the sun but exhausted their hydrogen fuel — to determine the stars» masses and ages.
Previous observations looked at brighter, aging red giant stars, which are not as plentiful because they represent a brief episode in a star's lifetime.
The stars may be passing through a stage of stellar evolution that lasts no more than a few tens of thousands of years, the scientists say — a phase between red giants (about 30 or 40 times the size of our sun) and blue subdwarfs (stars about one - fifth the size of our sun but seven times hotter and 70 times brighter).
A mainstream star like the sun grows gradually brighter and hotter as it ages (it's happening right now) until the final spasm that inflates it into a red giant.
So - called asymptotic giant branch stars are bright, aging suns that burn both hydrogen and helium, and astronomers have caught them manufacturing fluorine.
Previous research suggested these giants release extraordinarily large amounts of light when they rip apart stars and devour matter, and likely are the driving force behind quasars, which are among the brightest objects in the universe.
Suddenly they spied an intensely bright light, which they thought at first was a new supernova, the explosive death of a giant star.
Seen in ultraviolet light, the red giant star MIRA (bright dot at right) sports a cometlike tail stretching more than 13 light - years.
While the bright part of the nebula is of about 65 arc seconds in diameter (more accurately, the «cork» is about 42x87», the «wings» 157x87»), this nebula is surrounded by a faint halo covering a region of 290 arc seconds in diameter (Millikan, 1974); this material was probably ejected in the form of stellar winds from the central star when it was still in the Red Giant phase of evolution.
According to a NASA announcement on Friday, «TESS will use an array of telescopes to perform an all - sky survey to discover transiting exoplanets ranging from Earth - sized to gas giants, in orbit around the nearest and brightest stars in the sky.
Here we report observations of the bright star HD 195689 (also known as KELT - 9), which reveal a close - in (orbital period of about 1.48 days) transiting giant planet, KELT - 9b.
Here we report observations of the bright star HD 195689, which reveal a close - in (orbital period ~ 1.48 days) transiting giant planet, KELT - 9b.
Abstract: We present the discovery of the giant planet KELT - 19Ab, which transits the moderately bright $ (\ mathrm -LCB- V -RCB- \ sim 9.9) $ A8V star TYC 764 -1494-1 with an orbital period of 4.61 days.
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The project, led by principal investigator George Ricker, a senior research scientist at MKI, will use an array of wide - field cameras to perform an all - sky survey to discover transiting exoplanets, ranging from Earth - sized planets to gas giants, in orbit around the brightest stars in the sun's neighborhood.
The project, led by principal investigator George Ricker, a senior research scientist at the MIT Kavli Institute for Astrophysics and Space Research (MKI) will use an array of wide - field cameras to perform an all - sky survey to discover transiting exoplanets, ranging from Earth - sized planets to gas giants, in orbit around the brightest stars in the sun's neighborhood.
According to Professor Jim Kaler at the University of Illinois» Department of Astronomy, Rana started life as a main sequence F8 dwarf (somewhat hotter and brighter than Sol with slightly greater mass) around 7.5 billion years ago, but core hydrogen fusion has ceased causing the star to expand and cool as an active subgiant before becoming much brighter and larger «as a true giant star» through core helium fusion.
This second magnitude star is the 24th brightest (and the brightest red giant) in Earth's night sky.
Gacrux is a cool red giant star of spectral and luminosity type M3.5 III (but was once thought to be a «bright giant» of luminosity type II).
These extended, cool and hence red stars are key targets for stellar evolution studies as well as galactic studies for several reasons: a) many stars go through a red - giant phase; b) red giants are intrinsically bright; c) large stellar internal structure changes as well as changes in surface chemical abundances take place over relatively short time; d) red - giant stars exhibit global intrinsic oscillations.
Luminosity class 0 or Ia + is used for hypergiants, class I for supergiants, class II for bright giants, class III for regular giants, class IV for sub-giants, class V for main - sequence stars, class sd (or VI) for sub-dwarfs, and class D (or VII) for white dwarfs.
Marginal cases are allowed; for example, a star may be either a supergiant or a bright giant, or may be in between the subgiant and main - sequence classifications.
The Hyades cluster is a bright object in Taurus, but the view is partially ruined by Aldebaran - a brilliant orange giant star that lies in front of the cluster at less than half the distance.
The star - formation activity of the giant HII regions that spatially correspond to the former bright spots is found to be significantly higher than that of the rest of the galaxy.
Among its brightest stars are two magnitude five red giants and three binary stars.
Spica, Alpha Virginis, is the brightest star in Virgo and Menkent, Theta Centauri, is an orange giant with a visual magnitude of 2.06.
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