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  2. SPACE definition: 1. an empty area that is available to be used: 2. the area around everything that exists…. Learn more.

    • Space Radiation Invisible to Human Eyes
    • Dark Matter and Energy
    • Black Holes
    • Stars, Planets, Asteroids and Comets
    • Galaxies and Quasars

    The majority of space is relatively empty, with just stray bits of dust and gas floating around. This means that when humans send a probe to a distant planet or asteroid, the craft will not encounter "drag" in the same way that an airplane does as it sails through space. In fact, the vacuum environment in space and on the moon, is one reason why th...

    There remain two giant mysteries about space: dark matter and dark energy. While scientists have provided extensive evidence for the existence of dark matter and dark energy, they are each still poorly understood as, so far, scientists cannot directly observe them and can only observe their effects. Roughly 80% of all of the mass in the universe is...

    Smaller black holescan form from the gravitational collapse of a gigantic star, which forms a singularity from which nothing can escape — not even light, hence the name of the object. No one is quite sure what lies within a black hole, or what would happen to a person or object who fell into it – but research is ongoing. An example is gravitational...

    Stars (like our own sun) are immense balls of gas that produce their own radiation. They can range from red supergiants to cooling white dwarfs that are the leftovers of supernovas, or star explosions that occur when a big one runs out of gas to burn. These explosions spread elements throughout the universe and are the reason that elements such as ...

    Among the biggest cosmic structures we can see are galaxies, which essentially are vast collections of stars. Our own galaxy is called the Milky Way, and is considered a "barred spiral" shape. There are several types of galaxies, ranging from spiral to elliptical to irregular, and they can change as they come close to other objects or as stars with...

  3. en.wikipedia.org › wiki › SpaceSpace - Wikipedia

    Space is a three-dimensional continuum containing positions and directions. [1] In classical physics, physical space is often conceived in three linear dimensions. Modern physicists usually consider it, with time, to be part of a boundless four-dimensional continuum known as spacetime. [2]

  4. You use space to refer to an area that is empty or available. The area can be any size. For example, you can refer to a large area outside as a large open space or to a small area between two objects as a small space.

  5. SPACE definition: 1. an empty area that is available to be used: 2. the area outside the Earth: 3. during a period…. Learn more.

  6. SPACE meaning: 1. an empty area that is available to be used: 2. the area around everything that exists…. Learn more.

  7. What is space? Access the image. In space, no one can hear you scream. This is because there is no air in space – it is a vacuum. Sound waves cannot travel through a vacuum. 'Outer space' begins about 100 km above the Earth, where the shell of air around our planet disappears.

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