Space Travel

Since dark matter has not been observed by human beings, many people wonder how we can be so sure of its existence. (Image:  wikimedia /  CC0 1.0)

Dark Matter and Why It Matters

If you think that the entire universe is made up of matter that can be seen or detected, you are dead wrong. In fact, almost 85 percent of the matter present in the universe is thought to be composed of…

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Voyager 2 Could Be Nearing Interstellar Space

NASA’s Voyager 2 probe, currently on a journey toward interstellar space, has detected an increase in cosmic rays that originate outside our solar system. Launched in 1977, Voyager 2 is…

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Dark Matter and Why It Matters

If you think that the entire universe is made up of matter that can be seen or detected, you are dead wrong. In fact, almost 85 percent of the matter…