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When is the first day of winter 2024? In the Northern Hemisphere, the winter solstice will occur on Saturday, Dec. 21 at 4:21 a.m. EST. What happens on the winter solstice?
The black hole, similar to that of Cygnus X-3, has been hypothesized to be a quark star. [45] 4U 2129+ 47 is another X-ray binary containing a neutron star which undergoes outbursts, [46] as is EXO 2030+ 375. [47] Cygnus is also home to several variable stars. SS Cygni is a dwarf nova which undergoes outbursts every 7–8 weeks. The system's ...
Eta Cygni (η Cygni) is a star in the northern constellation of Cygnus. It is visible to the naked eye with an apparent visual magnitude of 3.889. [2] The star lies along the main body of the constellation, about midway between Gamma Cygni and Albireo. [9] Based upon an annual parallax shift of 23.55 mas, [1] it is located 138.5 light years ...
The Northern Cross is an astronomical asterism in the northern hemisphere of the celestial sphere, corresponding closely with the constellation Cygnus the swan. It is much larger than the Southern Cross and consists of the brightest stars in Cygnus: Deneb , Sadr , Gienah , Delta Cygni and Albireo .
NML Cygni or V1489 Cygni (abbreviated to NML Cyg or V1489 Cyg) is a red hypergiant [4] or red supergiant (RSG) in the constellation Cygnus.It is possibly one of the largest known stars currently known, and is also possibly one of the most luminous and massive cool hypergiants, as well as one of the most luminous stars in the Milky Way.
This winter will be the first in a few years to feel the effects of the phenomenon, which has a sizable impact on the weather during the coldest months of the year.
74 Cygni is a visual binary [9] star system in the northern constellation Cygnus, located around 249 light years distant from the Sun. It is visible to the naked eye as a faint, white-hued star with a combined apparent visual magnitude of 5.04. [2] The pair orbit each other with a period of 1.57 years and an eccentricity of 0.5. [5]
39 Cygni is a binary star [9] system near the southern border [4] of the northern constellation of Cygnus, approximately 270 light years away from Earth. [1] It is visible to the naked eye as an orange-hued star with an apparent visual magnitude of 4.43. [2] The system is moving closer to the Sun with a heliocentric radial velocity of −15 km ...