The Large Magellanic Clouds Essay examples

Have you ever looked up at the sky on a clear night and wondered, “what else is out there?”. What could possibly lie beyond the beautiful blanket of stars that we see with our naked eye? Nebulas are one of many galactic phenomena that lie beyond the Kuiper belt. Mysterious and fascinatingly beautiful sights to behold, they have more of a purpose than just painting the galaxy backdrop with color. I’m not a diehard fan of astronomy and to be perfectly honest I find it difficult to follow most of the information I have learned. However, when I came across pictures and information on nebulas I was instantly fascinated. From how and why they’re formed, to what they do for the galaxy, I’m excited to take you on an intellectual journey though nebulas.

The area on the H-R diagram where “normal” stars can be found is known as the _________.

a. The Milky Way galaxy is where our solar system is located in the universe.

14. Different levels of brightness are due to different levels of heat, and different distances.

Curtis correctly noted that spectral lines could be seen within the spiral nebulae, and that they were generally consistent with the nebulae in the form of large assembled star clusters. These clusters supported Curtis's argument that these were in fact stellar systems, which are comparable to our Milky Way

The map showed researchers that the stars are on the move in the Milky Way. From the information collected, about thirty percent of the stars in the Milky Way had moved from

Pasachoff, Jay and Filippenko, Alex. (2014) The Cosmos: Astronomy in the New Millennium. 5. Richmond, Michael. Late Stages of Evolution for Low-Mass Stars.

Scientists using NASA's Hubble Space Telescope have discovered that the i halo of gas enveloping the Andromeda galaxy, our nearest massive neighbor, is about six times larger and 1,000 times more massive than previously measured. The dark, nearly invisible halo stretches about a million light-years from its host galaxy, halfway to our own Milky Way galaxy. One of the most common types of galaxies in the universe.

Truly one of the showpieces of the northern sky is the Andromeda Galaxy, also known as Messier 31, M31 or NGC 224. The galaxy was known as the "little cloud" to the Persian astronomer Abd-al-Rahman Al-Sufi,

Parenago 1802, a member of the ∼1 Myr Orion Nebula Cluster, is a double-lined, detached eclipsing binary in a 4.674 d orbit, with equal-mass components (M2/M1=0.985±0.029). Here we present extensive V IC JHKS light curves spanning ∼15 yr, as well as a Keck/HIRES optical spectrum. The light curves evince a third light source that is variable with a period of 0.73 d, and is also manifested in the high-resolution spectrum, strongly indicating the presence of a third star in the system, probably a rapidly rotating classical T Tauri star. We incorporate this third light into our radial velocity and light curve modeling of the eclipsing pair, measuring accurate masses (M1=0.391±0.032, M2=0.385±0.032 M⊙), radii (R1=1.73±0.02, R2=1.62±0.02 R⊙), and temperature ratio (Teff,1/Teff,2=1.0924±0.0017). Thus the radii of the eclipsing stars differ by 6.9±0.8%, the temperatures differ by 9.2±0.2%, and consequently the luminosities differ by 62±3%, despite having masses equal to within 3%. This could be indicative of an age difference of ∼ 3 × 105 yr between the two eclipsing stars, perhaps a vestige of the binary formation history. We find that the eclipsing pair is in an orbit that has not yet fully circularized,

The scientists using the NASA/ESA Hubble and NASA’s Herschel telescopes looked further out into the Universe. They want to observe the early galaxies. According to the scientists, 83 percent of all stars formed since the Bing Bang were actually located in disc-shaped galaxies.

Discoveries of what were termed “nebulae” began in the early 17th century. The first of these discoveries was the Orion Nebula, which looked like a normal star to the naked eye. French scholar Peiresc discovered it in 1610 using one of the first telescopes to be made. Later, in 1656, Christiaan Huygens observed the interior of the Orion Nebula and determined that it consisted of a compact quadruple star system instead of a singular star. During the 18th and 19th century, nebulas were discovered even though astronomers were mainly scanning the sky for comets. Some major astronomers who contributed greatly to the discovery of nebulas, among other things, during the 18th and 19th century were Messier and the Herschel family. Though the instrumentation available to astronomers during the 18th and 19th century were highly advanced compared to earlier times, they weren’t advanced enough to detect the motion of extragalactic objects or their composition. This lack of precision instrumentation, and thus the dissociation from motion of stars/star-clusters/nebulae, were the main reasons astronomers during this

During the 1970s, dark matter had been discovered accidentally by astronomers Vera Rubin and Kent Ford, they were observing galaxies and they noticed that stars far from the galaxy centre had a velocity similar to the celestial objects closer in. The observation was unexpected due to the visible mass of galaxies lacking the required gravity to keep the further stars in the orbit, therefore the astronomers were faced with a “missing mass” problem and the concept of dark matter had been created (16). The main problem with dark matter is that we can’t observe it directly, we must indirectly study its interaction with normal matter to be learn more about it (17). There may be a misconception between what is observed and what is known to be there, for example; if a man is floating mid-air, due to the fact that humans are unable to fly; it can be concluded that there must be something holding the man up there (2). In 1997, Hubble Space Telescope revealed light from far galaxies bent due a mass of 250 times greater than the visible mass which that scientists believe dark matter is the reason for (18). Also, NASA’s Chandra X-ray observatory had been used by astronomers to measure the allocation of dark matter in an immense constellation of galaxies located around a billion light year from earth, the cluster is engulfed by a significant amount of clouds of hot gas, from the observation it had been found that the amount of dark matter is a hundred trillion more than the mass of the sun which held the cluster of gravities together (17). Comprehending dark matter is an important task to understand the most vital aspects of the

The Orion Nebula contains one of the brightest star clusters in the night sky. With a magnitude of 4, this nebula is easily visible from the Northern Hemisphere during the winter months. It is surprising, therefore, that this region was not documented until 1610 by a French lawyer named Nicholas-Claude Fabri de Peiresc. On March 4, 1769, Charles Messier inducted the Orion Nebula, M42, into his list of stellar objects. Then, in 1771, Messier released his list of objects for its first publication in Memoires de l'Academie.1

A galaxy, also called a nebula, consists of billions of stars, interstellar gas, dust, and dark matter which are all bound to form a massive cloud in which we live in. Although it cannot be very well explained, dark matter makes up at least 90% of a galaxy’s mass.