In the early s, one thing was fairly certain about the expansion of the universe. It might have enough energy density to stop its expansion and recollapse, it might have so little energy density that it would never stop expanding, but gravity was certain to slow the expansion as time went on. Granted, the slowing had not been observed, but, theoretically, the universe had to slow. The universe is full of matter and the attractive force of gravity pulls all matter together. Then came and the Hubble Space Telescope HST observations of very distant supernovae that showed that, a long time ago, the universe was actually expanding more slowly than it is today.
Difference Between Dark Matter and Dark Energy
Dark Energy - Words | Help Me
Please join StudyMode to read the full document. We chose this topic on Dark Matter as it intrigues us what is beyond our atmosphere and what is it made off. We want to know how Scientists realized the existence of Dark Matter despite knowing what it is. We feel that it may not be a concern to others, but in true fact Dark Matter is a sub-topic of Dark Energy. Dark Energy is the opposing force of gravity and it may destroy the universe. Thus we want to research on Dark Matter in order to learn more about this topic on Dark Energy. Research Question 1 To what extent do the scientists agree with the existence of Dark Matter?
Accelerating Universe and Dark Energy
In physical cosmology and astronomy , dark energy is an unknown form of energy that affects the universe on the largest scales. The first observational evidence for its existence came from measurements of supernovae, which showed that the universe does not expand at a constant rate; rather, the expansion of the universe is accelerating. Prior to these observations, the only forms of matter—energy known to exist were ordinary matter , antimatter , dark matter , and radiation. Measurements of the cosmic microwave background suggest the universe began in a hot Big Bang , from which general relativity explains its evolution and the subsequent large-scale motion. Without introducing a new form of energy, there was no way to explain how an accelerating universe could be measured.
There are many numberless stories of science and till to date most of them are demystifying, and out, darkness is one. So far, no one can decide what darkness is and from where it continues to exist and why rights are overbearing to remove darkness. Science does not solve many theories of English, and the probable energy associated with science is a part.