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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. Aldebaran (α Tauri) Facts - The Nine Planets

    nineplanets.org/aldebaran-α-tauri

    Aldebaran currently has a diameter of around 61 million kilometers / 37.9 million miles, and a radius of about 30.7 million kilometers / 19 million miles. It is thus around 44 times bigger than our sun. Though it is much bigger than our sun, it has only 1.7 solar masses. Thus it is just 17% more massive than the sun.

  4. The Sun Profile. diameter: 1,390,000 km. mass: 1.989e30 kg. temperature: 5800 K (surface) 15,600,000 K (core) History of The Sun. The Sun is by far the largest object in the solar system. It contains more than 99.8% of the total mass of the Solar System (Jupiter contains most of the rest). It is often said that the Sun is an "ordinary" star.

  5. Best Space-Themed Board Games For Kids & Adults 2024 - The Nine...

    nineplanets.org/guide/best-space-themed-board-games

    The Race to Space board game set includes 56 Star Cards, 248 Mission Cards, 32 Action Cards, four dice, one rulebook, and an ultimate edition neoprene game mat. This game is designed for ages eight years and above and can be played with 2 to 4 players. PROS. Customizable game cards. Easy to understand.

  6. When Was the Moon Discovered? | Space Questions - The Nine...

    nineplanets.org/questions/when-was-the-moon-discovered

    In 1959 the first humanmade object Luna 1 escaped Earth’s gravity and passed close to the Moon. This would lead to a decade of advancements and a race to land humans on the Moon’s surface. In 1969 the US through the Apollo 11 mission landed men on the Moon. Neil Armstrong was first to set foot on the lunar surface.

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

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

    There is a vast distance between Earth and Jupiter but depending on their respective orbits this distance varies. On average they are 484 million miles apart. At their closest they are only 365 million miles apart but at their furthest they are 601 million miles apart. How Far is Jupiter from the Sun?

  8. Solar System Scope is an incredibly accurate solar system tour, allowing you to explore the solar system, the night sky and outer space in real-time. All of the objects on the tour are accurately positioned based on where they are right this very second, and the tour contains interesting facts and information about the many objects in space.

  9. Scientists have researched and estimated that our Earth is around 4.5 billion years old. Earth formed at around the same time as the rest of our Solar System. Earth revolves around the Sun once every 365.25 days – this is known as one Earth year. In one year, Earth rotates like a spinning ball about 366.25 times – they are known as Earth days.

  10. How Old is the Universe? | How They Know, Age & History - The...

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

    The Earth is estimated to be 4.54 billion years old, so the Universe itself is, on average, around three times older than our Earth but only if the Universe is indeed 13.8 billion years old. Our galaxy, the Milky Way, might be a better comparison, as it is 13.51 billion years old.

  11. The primary star, Meissa, is a giant star of stellar classification O8 II. Meissa is the 11 th brightest star in Orion, and it marks the head of Orion, the celestial hunter. Meissa has an apparent magnitude of 3.33 and an absolute magnitude of -4.25. The secondary star has an apparent magnitude of 5.61, and an absolute magnitude of -1.94.