Where Does Outer Space Begin?

Outer space is the expanse that exists beyond Earth's atmosphere but a clear boundary between the two is impossible to define because the density of atmosphere gradually decreases as altitude increases. However, the Kármán line at 100 km above sea level is generally used to mark the beginning of outer space

What Is The Ninth Planet In Our Solar System?

Until its reclassification as a dwarf planet in 2006, Pluto was considered to be the ninth planet. However, it is now believed that there really is a ninth planet beyond the Kuiper belt - the cold scattered disc region towards the outer edge of the Solar System. First proposed in 2015,

Does The Sun Actually Rise In The East?

The illusion of the Sun rising is due to a rotating reference frame whereby the Earth's motion causes the Sun to come into view. That aside, is it true that the sun rises in the east and sets in the west? Sunrise is commonly defined as being when the upper limb