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The following is a list of stars with resolved images, that is, stars whose images have been resolved beyond a point source. Aside from the Sun , observed from Earth , stars are exceedingly small in apparent size, requiring the use of special high-resolution equipment and techniques to image.
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English: Butterfly life cycle diagram, in English. The butterfly is the Southern Monarch (Danaus erippus). The butterfly is the Southern Monarch (Danaus erippus). Date
Representative lifetimes of stars as a function of their masses The change in size with time of a Sun-like star Artist's depiction of the life cycle of a Sun-like star, starting as a main-sequence star at lower left then expanding through the subgiant and giant phases, until its outer envelope is expelled to form a planetary nebula at upper right Chart of stellar evolution
The following are lists of stars. Stars are astronomical objects that spend some portion of their existence generating energy through thermonuclear fusion . By location
The third dredge-up occurs after a star enters the asymptotic giant branch, after a flash occurs in a helium-burning shell. The third dredge-up brings helium, carbon, and the s-process products to the surface, increasing the abundance of carbon relative to oxygen; in some larger stars this is the process that turns the star into a carbon star. [3]
A recent survey of Mira variable stars found that 75% of the Mira stars which could be resolved using the IOTA telescope are not spherically symmetric, [6] a result which is consistent with previous images of individual Mira stars, [7] [8] [9] so there is now pressure to do realistic three-dimensional modelling of Mira stars on supercomputers. [10]
Its form also resembles the wings of a butterfly. The nebula was imaged by the Hubble Space Telescope in the 1990s. The primary component of the central binary is the hot core of a star that reached the end of its main-sequence life cycle, ejected most of its outer layers and became a red giant, and is now contracting into a white dwarf. It is ...