Albert Einstein's Discourse Concerning Gravity

Furthermore existence that black holes exist comes from the observations of astronomers of bursts of energy which are detected and then lost. An event horizon is an area of space around a black hole for which nothing can escape, once an object or any matter crosses this event horizon the gravity of the black hole will be too strong for it to escape. As a cloud of gas swirls and nears a black hole, the gases heat up and will emit x-rays. Astronomers have observed instances of several burts of x-rays being detected and then disappearing at areas where black holes are thought to be found. This may be caused by the gases emitting x-rays and then crossing the event horizon and disappearing forever. The observations of these bursts of energy are useful for astronomers in finding black holes.

“classified Hubble as a Cassegrain reflector, who was among the first to suggest a basic optical design.”1 The Hubble space telescope was launched and deployed in April of 1990, which “marked the most significant advance in astronomy since Galileo's telescope. Thanks to four servicing missions and more than 25 years of operation, the view of the universe and humanity's place within it has never been the same.” 2 In describing how

The visible universe- including Earth, the sun, other stars, and galaxies is made of protons, neutrons, and electrons bundled together into atoms (National Geographic, 2012). Astronomers use the term ‘baryonic’ to refer to all objects made of normal atomic matter, essentially ignoring the presence of electrons (Swinburne University, 2015). Baryons interact with each other through gravity, nuclear forces and the electrostatic force. These interactions are what allow baryonic matter (such as stars) to emit light (Grocutt, 2012). One of the most surprising discoveries of the 20th century was this ordinary, or baryonic, matter makes up less than 5 percent of mass of the universe. The rest of the universe appears to be made of a mysterious, invisible substance called dark matter (25 percent) and a force that repels gravity known as dark energy (70 percent) (National Geographic, 2012).

Dark matter is a type of matter that is invisible, but accounts for most of the mass and structure of the universe. Hubble allowed scientists to observe how dark matter bends the light of galaxies that are far away through gravitational lensing. Scientists could then theorize about the existence of dark matter. Due to Hubble’s unique viewpoint, scientists could also map where dark matter is located and how it is distributed in galaxies. Hubble also played a large role in the discovery of dark energy. Dark energy is a repulsive force that causes the universe to expand at a faster and faster rate. Hubble not only detected the presence of dark energy, but also that it has been around since almost the beginning of the universe. It was used to look back in time at supernovae, which are used to trace how the universe expanded. Only Hubble could be used for this task because telescopes on the ground would be unable to see these very distant and faint supernovae. Hubble changed the field of astronomy through its part in discovering dark matter and dark

Gravity. We all know what it is, and we take that for granted. But, as all great discoveries, there was a time before “gravity”. Of course, it existed, just people didn't really know about it, or how it worked. That is, until the year 1687, when Isaac Newton came about. But first, let's back up.

Before Newton talked about gravitation the main knowledge of scientists was a elementary knowledge of optics, mechanics and astronomy.Copernicus Kepler and Galileo provided the background knowledge of the stars and planets, but Newton used their data to discover the whole gravitational system.10Newton reasoned that the planets and all other physical objects in the universe moved through mutual attraction of gravity.Newton said that every other object in the universe affected every other object through gravity.This explained why the planets move in an orderly fashion. Newton found that “the force of gravity towards the whole planet did arise from and was compounded of the forces of gravity towards all it’s parts, and towards every one part was in the inverse proportion of the squares of the distances from this part.”Newton proves all of this mathematically. This was known to be the single most important contribution to physics that ever has been made.11

In the article “Gravitational Waves Hit Prime Time” the author talks briefly upon the properties of gravitational waves, but also talks about LIGO (Laser Interferometer Gravitational-wave Observatory) and the eLISA pathfinder scheduled for launch around 2034. However, the author states that the initial LIGO is not as great as advanced LIGO. He also says that gravitational waves are very weak.

Gravity is the force which attracts an object to the center of the earth, and toward any other physical object having mass. Issac Newton and Albert Einstein both contributed to today's knowledge of gravity.Newton started working in 1687 by scratch, he knew nothing about gravity it until he saw an apple fall. Newton dint have much friends growing up because he would lock himself in his room and brainstorming ideas about how gravity could work. A few decades later Einstein started brainstorming off Newtons work to get an even better understanding of it.

Light is the fastest form of energy on earth which nothing can compare. But there is something that can consume this energy. This comes in the form of a black hole which will take the energy of the light and end the travel of speed. The mystery behind the black hole has people unsure what it truly is. Thousands of years ago, John Michelle, a British mathematician noticed the black star in the sky. In 1793 he described these dark stars as a hole that could omit energy faster than light, based on Newton’s laws of gravity (Talcott, 2016). Giving up on the black star, it wasn’t until Albert Einstein, 1915, with his theory of relativity that the initial explanation would begin on the black hole (Talcott, 2016).

Radar astronomy utilizes radio waves to enhance our understanding of the distances, movements, land formations, and positions of celestial bodies contained within our universe and how they might impact our life on Earth. Discoveries have been made possible through the return rate of echoes of radio waves gathered from the targeted object. Utilization of inspecting the galaxy through radar astronomy is precise and does not require large space endeavors. Nevertheless, usage of radar astronomy also gives us an accurate representation of the terrain and land formation of celestial bodies such as stars, asteroids, and planets. Over fifteen thousand discoveries of near-earth asteroids have been found as of October 13, 2016, with approximately 30

Scientists in the USA have seen something amazing in space for the very first time. They saw gravitational waves. These are waves that form in space and travel outwards. The waves are similar to how ripples in water move outwards after you throw a stone in a lake. The gravitational waves in space start when two giant space objects hit each other. Albert Einstein first spoke about waves in space in 1916 when he made his General Theory of Relativity. One hundred years later, the researchers have proved that Einstein's theory was right. The researchers used powerful technology to see the gravitational waves. Einstein did not have this technology. He used his genius to predict that the waves existed.

The article starts telling the readers how a team of scientists announced on Thursday, February 11, that they had heard and recorded the sound of two black holes colliding a billion light-years away. The far-off tone that was recorded is the first straightforward evidence of gravitational waves. Gravitational waves are ripples in the fabric of space-time. This discovery

The needs for an instrument that would take images of the universe from the space were inevitable since there were so many challenges studying space and the universe from earth. The Hubble telescope, named after the great scientist who confirmed the big bang theory, was the solution to this and it has been in space for the more than 20 years it was supposed to live. Over the time, the telescope has sent home so much information that mankind has realized how little they knew about the universe. This paper covers the needs for the Hubble telescope in space, the impacts that it has had in physics and science and what eventually happens to the telescope when its time expires.

Dark matter and dark energy are some of the most mysterious phenomena in the universe, sparking interest in many astronomers and physicists today. Although we haven’t yet found any way to directly observe either dark matter or dark energy, scientists have been able to see it’s effects and confirm the existence of these abstract forces.

Albert Einstein was a German-American theoretical physicist, best known for developing the general theories of relativity. He is largely considered the most influential physicist of the 20th century.