Ví dụ về việc sử dụng Cygni trong Tiếng anh và bản dịch của chúng sang Tiếng việt
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The bright star is Gamma Cygni.
Proper motion of 61 Cygni in one year intervals.
The location is close to the bright star γ Cygni.
Cygni showing proper motion at one year intervals.
It also includes one of the largest known stars,NML Cygni.
Cygni in fiction-- Stars and planetary systems in fiction.
A size comparison between the Sun(left), 61 Cygni A(bottom) and 61 Cygni B(upper right).
What sets V404 Cygni apart from others is that its disk of material and black hole are misaligned.
Both stars exhibit stellar flare activity, but the chromosphere of Bis 25% more active than for 61 Cygni A.
In 1911,Benjamin Boss published data indicating that the 61 Cygni system was a member of a comoving group of stars.
Cygni A is the fourth-nearest star that is visible to the naked eye for mid-latitude northern observers, after Sirius, Epsilon Eridani, and Procyon A.
In the future this issue may be resolved through the use of asteroseismology.[2] 61 Cygni A has about 11% more mass than 61 Cygni B.[3].
Aludra is classified as an Alpha Cygni type variable star and its brightness varies from magnitude +2.38 to +2.48 over a period of 4.7 days.
Only a few years after Bessel's measurement, in 1842 Friedrich Wilhelm Argelander noted that Groombridge 1830 had an even larger proper motion,and 61 Cygni became the second highest known.
SiO masers were detected from χ Cygni in 1975.[1] H2O emission from χ Cygni's atmosphere was detected in 2010, but H2O masers have not been found.[2].
ASAS-3 photometry shows a period of 40.44 days.[2] HD 183143 was formally announced as a variable star,probably of the α Cygni type, in 1979 and given the variable star designation HT Sagittae.[3].
Cygni A is a typical BY Draconis variable star designated as V1803 Cyg while 61 Cygni B is a flare type variable star named HD 201092 with their magnitudes varying 5.21 V and 6.03, respectively.
In order, the 22 member stars are α and 4 Lacertae,π2 and π1 Cygni, stars 5 and 6, HD 206267, 13 and ε Cephei, β Lacertae, σ, ρ, τ, and AR Cassiopeiae, 9 Lacertae, 3, 7, 8, λ, ψ, κ, and ι Andromedae.
Cygni Bb or HD 186427 b is an extrasolar planet approximately 69 light-years away in the constellation of Cygnus.[1] The planet was discovered orbiting the Sun-like star 16 Cygni B, one of two solar-mass(M☉) components of the triple star system 16 Cygni.
In 1911, Benjamin Boss published data indicating that the 61 Cygni system was a member of a comoving group of stars.[35] This group containing 61 Cygni was later expanded to include 26 potential members.
Cygni A is the fourth-nearest star that is visible to the naked eye for mid-latitude northern observers, after Sirius, Epsilon Eridani, and Procyon A.[3] This system will make its closest approach at about 20,000 CE, when the separation from the Sun will be about 9 light-years.
This would not be the first known planet in a triple star system- for example,the planet 16 Cygni Bb had been discovered earlier, orbiting one of the components of a wide triple system also in the constellation of Cygnus.
One of them, 61 Cygni, was specially appointed as a good candidate for measuring a parallax, which was later performed by Friedrich Wilhelm Bessel.[5] The star system 61 Cygni is sometimes still called variously Piazzi's Flying Star and Bessel's Star.
Possible examples of supernova impostors include the Great Eruption of Eta Carinae,P Cygni, SN 1961V,[3] SN 1954J, SN 1997bs, SN 2008S in NGC 6946, and SN 2010dn[1] where detections of the surviving progenitor stars are claimed.
Such an excess is sometimes associated with a disk of dust, but in this case it lies sufficiently close to one or both of the stars that it has not been resolved with a telescope.[63] A 2011 study using the Keck Interferometer Nullerfailed to detect any exozodiacal dust around 61 Cygni A.[64].
In some systems where the phenomenon has been observed,such as in CG Cygni, RT Lacertae, XY Ursae Majoris, or YY Eridani, the luminosity difference between subsequent maxima has been found to be variable, in others relatively stable.
Cygni A is a typical BY Draconis variable star designated as V1803 Cyg while 61 Cygni B is a flare type variable star named HD 201092 with their magnitudes varying 5.21 V and 6.03, respectively.[47] The two stars orbit their common barycenter in a period of 659 years, with a mean separation of about 84 AU- 84 times the separation between the Earth and the Sun.
Since no certain planetary object has been detected around either star so far, McDonald Observatory team has set limits to the presence of one or more planets around 61 Cygni A and 61 Cygni B with masses between 0.07 and 2.1 Jupiter masses and average separations spanning between 0.05 and 5.2 AU.[61].
Due to the wide angular separation between 61 Cygni A and B, and the correspondingly slow orbital motion, it was initially unclear whether the two stars in the 61 Cygni system were a gravitationally bound system or simply a juxtaposition of stars.
Although it appears to be a single star to the naked eye, 61 Cygni is a widely separated binary star system, composed of two K class(orange) main sequence stars, the brighter 61 Cygni A and fainter 61 Cygni B, which have apparent magnitudes of 5.2 and 6.1, respectively.