| Today, our sun is a main-sequence star, converting hydrogen into helium at its core. |
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| Kepler-16 contains the first discovered planet that orbits around a binary main-sequence star system. |
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| If the accretor is a normal main-sequence star, the orbital speed is hundreds of kilometres per second. |
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| When the interior temperature of a protostar reaches a few million Kelvin it can begin to burn hydrogen and become a main-sequence star. |
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| Thus, the Sun, a main-sequence star, is classified as G2 V, in which the V denotes main sequence. |
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| How seismology can distinguish a pre-main-sequence star from a main-sequence star? |
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| Over billions of years, enough of this material could accumulate in a main-sequence star to leave a core of strange matter when the star dies. |
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| A supergiant star such as Antares, a bright main-sequence star such as Rigel, or even a more modest star such as Sirius cannot have endured as long as the Sun has endured. |
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| Where the accretor is always a white dwarf, the donor star can be either a white dwarf, a low-mass helium star or an evolved main-sequence star. |
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| This would make Beta Pictoris far too young to qualify as a main-sequence star, burning hydrogen at its core. |
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| The new observation also marks the first time astronomers have imaged a disk around a mature, main-sequence star using the radio energy given off by dust particles. |
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