5. Where did galaxies come from?
Science has only recently been able to explain where the stars and planets came from. Now, scientists have turned their attention to a much bigger mystery, where did galaxies come from? What is known is that galaxies are not scattered randomly throughout space, rather they are found in clusters, known as “super clusters”. Scientists have two main theories to attempt to explain galaxy formation. First, the gas left over from the big bang clustered together to form galaxies, in which stars and planets were born. Second is that gas from the big bang created stars and planets all over the universe, and they migrated through gravity into galaxies. Neither theory has been universally accepted yet.
4. Other Earths
Our star, the sun, is just one of trillions in the universe. When you look at the fact that our star has eight planets, and do the math, it tells you that it is possible for there to be eight times as many planets in the universe than stars; an astounding figure. Is it not possible that just one of those planets might have life on it? It is a fact that, since the year 2000, hundreds of extra solar planets have been discovered orbiting distant stars. Some of these have found to be earth- like, such as the planet Gliese 581d, a planet believed to have liquid water on its surface. Could it possibly contain life? Hopefully with advances in technology in the next decade, we will soon know the answer. Till then, it remains one of space’s greatest mysteries.
3. Are there Other Universes?
This is one of the more controversial arguments out there. The theory is that there are an infinite number of universes, each which is governed by its own set of laws and physics. Many scientists dismiss this argument as nothing more than speculation, as there is no evidence or mathematical law that allows for the existence of other universes. However, believers in this theory have argued that there are none that disprove it either. This is one mystery which can only be solved if we were able to travel there, however, with the expansion of the universe, it is unlikely humanity will ever find the answer.
2. Dark Matter
Albert Einstein’s equation E = MC^2 is perhaps the best known equation of the century. However when applied to space, an anomaly occurs. When we use it to determine how much matter the universe should have, we realize that we have only found four percent of the matter in the universe! Where is the rest of it? Many believe it is in the form of dark matter. Where is this dark matter? It’s everywhere, wherever there is no visible matter. Scientists have yet to show any conclusive proof that dark matter does in fact exist. The fact that you can’t see it, touch it, and light and radio waves pass right through it undeterred makes it extremely hard to detect.
1. Mars/Earth Connection
When talking about life on other planets, some say we need go no further than our own solar system. Mars has always been thought to harbor life by many conspiracy theorists, saying that NASA is covering it up. Many photos have also called into question civilization on Mars, such as the face on Mars, Pyramids on Mars, and photo of what appears to be an ape like figure sitting on a rock on Mars. While scientists have come out to debunk these photos, they have also admitted that they believe liquid oceans once covered the surface of Mars before its magnetic field disappeared. Is it possible that life did indeed once exist? The current missions to Mars hopes to answer this question.
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