From the dawn of time, human beings have always been fond of exploring and learning more about space and its contents. From the beautiful galaxies to the different types of nebulae, there is so much information out there that we do not know about. Cosmology is the study of the history of the universe from the perspective of physics. It addresses questions in a very large quantity, questions like: what is the size of the universe of how old the universe is. These questions can be answered through cosmologists or people who study Cosmology. Cosmologists’ work to understand on how the Universe came into being or what is going to happen in the future. They make enormous observations using telescopes and as the technology gets better, the cosmologists have a better chance of answering these questions.
The Hubble telescope was a break through in the study of Cosmology (Reference 1). Due to the large mirror installed on the telescope, the clarity of the picture was better. And a picture is worth a thousand words. It was a telescope like no other. The Hubble Telescope is not the only way to explore space; we can still investigate on the subject of space by giving off radio waves that can be detected with radio telescopes. We know many facts and theories on space but there is still a lot space to explore if we want to know the whole lot about space. As technology increases, we as human beings are learning more and more on space. We are discovering new planets and even new galaxies. We are advancing in space exploration like a rocket.
Linked to space exploration is the Big Bang theory, which states that the universe started at one point about 13.7 billion years ago and everything is flying away like the pieces after a bomb after it has exploded. This point is very small, smaller than an atom and it was presumably very hot too because it was pure light energy. There was no space or time outside this point of energy. The space between the energy particles expand, fast at first, then it slows down and space still continues to expand.
As the universe expands, it cools down and some of this energy turns into matter. At first, the universe was so small that all this matter was like fog and this stopped light from spreading (Reference 2). After approximately 380,000 years, the universe had expanded enough for the light to shine, which means the fog got thin enough. Then the dust got collected to form galaxies and planets. The theory is called Big Bang because of the predicted loud sound made when the creation of the universe, like the explosion of a bomb. Many cosmologists agree with this theory because of the evidence and observations that support this theory.
Speaking of cosmologists, there have been famous cosmologists roaming our earth and two of the more important cosmologists were Edwin Hubble and Stephen Hawking. Edwin Hubble, who at age 30, had an undergraduate degree in astronomy and mathematics, a legal degree as a Rhodes scholar, followed by a PhD in astronomy (Reference 3). Edwin Powell Hubble is famous for determining that there are other galaxies in the Universe beyond the Milky Way, and for observing that the universe is expanding at a constant rate. Stephen Hawking was born on the 300th Anniversary of Galileo’s death. In 1988, Hawking wrote A Brief History of Time: From the Big Bang to Black Holes, explaining the evolution of his thinking about the cosmos. It became a best seller of long standing and established his reputation as an accessible genius (Stephen Hawking).
The universe has been in existence for many millions of years, around 13.7 billion years because of the beginning of the universe can be expressed in terms of the Big Bang Theory and since this theory states that the universe started 13.7 billion years ago. The number of years continues to rise, but what impact does the estimated age have on the Earth’s development. If the age of the universe is increasing, then the Earth will be having some devastating consequences but not any time soon.
The sun would eventually die turning into a white dwarf and this emits very little sunlight and this can affect the development of the Earth for living organisms. It is predicted that a big crunch could happen, which basically means that the gravitational pull will get so strong that the universe will cave in and create a black hole. Our magnetic field is also decaying and it will eventually die which means that our compasses and other electronic devices wouldn’t work. So the age of the universe has a dramatic impact on the Earth’s development.
When exploring space, there is an infinite of stuff out in space and something we do know about space are pulsars. A pulsar is a neutron star, which releases beams of radiation that sweep through the earth’s line of sight. Like a black hole, it is an endpoint to cosmological evolution. The, “pulses,” of high-energy radiation we see from a pulsar are due to a misalignment of the neutron star’s rotation axis and its magnetic axis (Reference 4). Pulsars pulse because the rotation of the neutron star causes the radiation generated within the magnetic field to sweep in and out of our line of sight with a regular period. Wavelengths from Pulsars give scientists important clues to how the radiation is created. Black holes are similar to Pulsars but they are quite different because they both are very unique objects.