Category: Science

Why is the color of the clear sky blue

If you look at the sky from space on a summer day, it is black and sunlight glows white. Why is the color of the clear sky blue When viewed from the ground, the colors appear different: the sky is an intense blue, with the sun projecting a warm...

Why is Pluto not a planet anymore ?

Officially, as of 24 August 2006, Pluto is no longer considered a true planet, but a dwarf planet. Why is Pluto not a planet anymore ? It was approved by the General Assembly of the International Astronomical Union, which also set a series of guidelines on whether a celestial...