The Solar System
The age of the Universe is at least 15 billion years old, but probably not more than 20 billion years old.
Most of the bodies in the solar system travel around the Sun along nearly circular paths or orbits, and all the planets travel about the Sun in the anticlockwise direction (when viewed from above).
The Big Bang theory is an effort to explain what happened at the very beginning of our universe.
It was soon discovered that it could be the remains of the radiation produced after the explosion that originated the Universe, according to the Big Bang theory. The background radiation was therefore studied in order to verify the various cosmological models within the Big Bang theory.
Within the solar nebula, dust and ice particles embedded in the gas moved, occasionally colliding and merging. Through this process, called “accretion,” these microscopic particles formed larger bodies that eventually became planetesimals with sizes up to a few kilometers across. This is how the solar system formed.
Stars begin life as a large, relatively cool mass of gas in a nebula, an example of which is Orion (left). As gravity causes the gas to contract, its temperature rises, eventually becoming hot enough to trigger a nuclear reaction in its atoms. The shining of a main sequence star (middle) is caused by the massive, fairly steady output of energy from the fusion of hydrogen nuclei to form helium.
Our worl is an amazing thing and people always argue what is going on in the universe. many people believe we never went to the moon but their wrong we have because how would we know so much and have videos of it. People also say that we cant ever live on other planets when really we can because all we need to do is reasearch and study how to do things right. I would use the info i found today when I study science and when I learn more on the universe.
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