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Main-sequence stars vary in surface temperature from approximately 2,000 to 50,000 K, whereas more-evolved stars – in particular, newly-formed white dwarfs – can have surface temperatures above 100,000 K. [3] Physically, the classes indicate the temperature of the star's atmosphere and are normally listed from hottest to coldest.
It is the fourth-closest star or (sub-) brown dwarf system to the Sun and was discovered by Kevin Luhman in 2013 using data from the Wide-field Infrared Survey Explorer (WISE). It is the coldest brown dwarf found in interstellar space, having a temperature of about 285 K (12 °C; 53 °F). [4]
The coolest main sequence star known as of 2023. Coolest giant stars ... If it is a binary, its components could be as cold as about 275-350 K. [16]
Color temperature is a parameter describing the color of a visible light source by comparing it to the color of light emitted by an idealized opaque, non-reflective body. The temperature of the ideal emitter that matches the color most closely is defined as the color temperature of the original visible light source.
The planet-star separation is 4.1 arcsec in JWST MIRI data and 4.8 arcsec in VLT VISIR data. It is undetected in VLT NaCo observations. [ 3 ] The temperature of 275 K is slightly warmer or similar to the nearby Y-dwarf WISE J0855−0714 (225 to 260 K or 285 K), making Epsilon Indi Ab likely one of the coldest objects to be directly imaged ...
TRAPPIST-1 is a cool red dwarf star [c] with seven known exoplanets.It lies in the constellation Aquarius about 40.66 light-years away from Earth, and has a surface temperature of about 2,566 K (2,290 °C; 4,160 °F).
Montana is the coldest in continental U.S. history, dropping to minus 70 degrees at Rogers Pass on Jan. 20, 1954. (MORE: Most Extreme U.S. Cold Outbreaks) 50-states-all-time-cold.jpg.
In astronomy, the color index is a simple numerical expression that determines the color of an object, which in the case of a star gives its temperature. The lower the color index, the more blue (or hotter) the object is. Conversely, the larger the color index, the more red (or cooler) the object is.