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Quiz "star: Stars"

star: Stars

the brightest star in the sky after the sun, lying in the constellation Canis Major. It is a binary star whose companion, Sirius B, is a very faint white dwarf. Distance: 8.6 light years

star: Stars

a binary star, one component of which is a red giant, the brightest star in the constellation Taurus. It appears in the sky close to the star cluster Hyades. Visual magnitude: 0.85; spectral type: K5III; distance: 65 light years

star: Stars

the star at the centre of our solar system. It is a gaseous body having a highly compressed core, in which energy is generated by thermonuclear reactions (at about 15 million kelvins), surrounded by less dense radiative and convective zones serving to transport the energy to the surface (the photosphere). The atmospheric layers (the chromosphere and corona) are normally invisible except during a total eclipse. Mass and diameter: 333 000 and 109 times that of earth respectively; mean distance from earth: 149.6 million km (1 astronomical unit)

star: Stars

a very remote luminous red supergiant, Alpha Orionis: the second brightest star in the constellation Orion. It is a variable star

star: Stars

the brightest star in the constellation Lyra and one of the most conspicuous in the N hemisphere. It is part of an optical double star having a faint companion. Distance: 25.3 light years; spectral type: A0V
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