Sun

We all think that the sun yellow or orange, but in fact, it is white. Yellows Sun gives phenomenon called "atmospheric scattering».

The spectral class of the Sun - G2V, it is closer to the cold end of the main sequence, and is classified as a yellow dwarf. Most of the stars in the Milky Way - "red dwarfs" (relatively small and cold stars), and approximately 15% of stars in the galaxy brighter than our sun.

The sun revolves around the center of our galaxy, the Milky Way, making a complete revolution every 225 - 250 million years.

Light travels an average distance from the Earth to the Sun (150 million kilometers) for 8 minut.Dlya comparison, the next nearest star, Proxima Centauri, is located 4 light-years ...

The Sun has a diameter of about 1,392,000 km (approximately 109 times the diameter of Earth). The mass of the sun is 98% of the mass of our solar system.

Between 1640 and 1700, the Sun did not have spots. This period is called the Maunder Minimum coincided with the "little ice age" - the common cold snap in the world when the river that never freezes, covered with ice and snow lay all year round at all latitudes. Currently, the Sun is at its peak activity.

The minimum number of eclipses in a year - or two. Solar eclipses in an ode to the same area are rare, as the eclipse visible only in a narrow band Moon's shadow. At any particular point on the surface total solar eclipse occurs on average one every 200-300 years.

In Malta, the average length of daylight in the summer - 10 chasov.V Samarkand - 15 hours in Stockholm - 18 hours, and in the Swedish city of Kiruna, located above the Arctic Circle - 24 hours. However, winter in Kiruna sun does not rise at all. By the way, the division of the day into 24 hours, we have borrowed from ancient Egyptian god of sun Ra, who spent twelve o'clock at night in a dark underworld, and the remaining 12 o'clock - in heaven.

300 sunny days a year is in Morocco, Nice, Brisbane (Australia), in Monte Carlo and in Ussuriysk ...

Every second, the Sun burns 700 billion. Tons of hydrogen. Despite such a huge loss rate, solar energy will be enough for 5 billion. Years of this life (about the same age from birth the Sun). Ended his life sun white dwarf previously increased in size and alienating all the planets. On these planets, all the water will evaporate and disappear atmosphere.

By weight of the Sun in 333 times larger than Earth. Along the radius of the Sun is 109 times larger than our planet. In the Sun concentrated 99, 8% of the total mass of the entire solar system.

Sun has an average density of 1 and 4 g / cm. cc., which is equal to the density of water in the Dead Sea.