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  2. How Long Have Humans Been on Earth? | Facts, Timeline & Early Man

    nineplanets.org/questions/how-long-have-humans-been-on-earth

    The Earth itself is 4.5 billion years old. Nonetheless, the six million years humans have been on Earth has allowed them to evolve, build tools, create civilizations, adapt to their environment, and become the humans we are today. It is hard to think about a time when humans were not on the Earth, but there indeed was a time.

  3. What would happen if there was no moon? - The Nine Planets

    nineplanets.org/questions/what-would-happen-if-there-was...

    The moon’s pull creates a bulge near the Earth’s equator, which means there is a lower level of water at the poles. Related: Earth Facts; Related: How long have humans been on Earth? The Moon’s gravity causes the oceans on our planet to rise and fall. As the water moves, there is slight friction between the moving water and the spinning ...

  4. Mintaka is a multiple star system at around 1.200 light-years away from Earth. It is 190.000 times more luminous than the Sun. It is located at the western end of Orion’s belt. Many folkish names have been given to Orion’s belt, such as Jacob’s Rod or Staff, Peter’s Staff, the Magi / the Three Kings, the Three Marys or simply the Three ...

  5. How Many People Have Walked on the Moon? | Facts, Names & Dates

    nineplanets.org/questions/how-many-people-have-walked-on...

    Since the landing of Apollo 11 in 1969, a total of twelve (12) astronauts have walked on the Moon. After Armstrong and Aldrin, more astronauts were sent to the Moon in Apollo 12, also in 1969. The two astronauts from Apollo 12 were Pete Conrad and Alan Bean. Both of these men were on the Moon for two days.

  6. How Long Does it Take to Get to Mercury? | Space Questions

    nineplanets.org/questions/how-long-does-it-take-to-get-to...

    Mercury’s distance from the Sun depends on where the planet is in its rotation. When Mercury is at its closest it is 29 million miles away from the Sun and at its furthest it is 43 million miles away. It takes a little over 3 minutes for the light of the Sun to reach the surface of Mercury. In context it takes just over 8 minutes for the same ...

  7. How Old is the Earth? | Age, Discovery, Life On Earth & Facts

    nineplanets.org/questions/how-old-is-the-earth

    If we were to put the Earth’s age into days, then approximately 1.658 trillion days have passed since its inception. When we look at other estimates of the Earth’s age, like, for example, the bible, it is estimated that our Earth is between 6,000 to 15,000 years old. Some Christian physicists believe that Earth is 4.6 billion years old.

  8. How Long Does Jupiter Take to Go Around the Sun?

    nineplanets.org/questions/how-long-does-jupiter-take-to-go...

    Of course it will have been visible for far longer than that and will have far predated the existence of humans. The ancient Chinese astronomers referred to Jupiter as Suixing (Sui Star) which makes sense as observation from Earth with the naked eye makes it appear as if it is in fact a star and not a planet.

  9. What Is The Coldest Planet In Our Solar System | Uranus &...

    nineplanets.org/questions/what-is-the-coldest-planet

    The short answer is that Neptune has the coldest overall average temperature and Uranus has the coldest temperature recorded. The long answer is that once upon a time the answer to this question was simple. Pluto was the planet furthest away from the Sun and also the coldest. However, Pluto was declassified as a planet in 2006 and is now known ...

  10. October 17, 2019. Uranus III. Titania (“ti TAY nee uh”) is the fourteenth and largest of Uranus’s known satellites: orbit: 436,270 km from Uranus. diameter: 1578 km. mass: 3.49e21 kg. Titania is the Queen of the Fairies and wife of Oberon in Shakespeare’s Midsummer-Night’s Dream. Discovered by Herschel in 1787.

  11. Located at the astonishing distance of about 21 million light-years from Earth, this beautiful grand-design spiral galaxy, conveniently called the Pinwheel, spans across 170 kly and is an example of magnificent deep-sky stellar factories. Distance: 21 million light-years. Diameter: 170 000 light-years. Other designations: Messier 101 (M101 ...