May 2016 night sky chart
... For Darwin and similar locations the chart will still apply, but some stars will be lost off the southern edge while extra stars will be visible to the north. Stars down to a brightness or magnitude limit of 4.5 are shown on the star chart. To use this star chart, rotate the chart so that the direct ...
... For Darwin and similar locations the chart will still apply, but some stars will be lost off the southern edge while extra stars will be visible to the north. Stars down to a brightness or magnitude limit of 4.5 are shown on the star chart. To use this star chart, rotate the chart so that the direct ...
AST301.Ch21.StellarExpl - University of Texas Astronomy
... as supernova remnants (SNRs). E.g. Crab Nebula (explosion in 1054 A.D. recorded by Chinese and Native Americans). Hundreds of these are known (see illustrations in book for the interesting forms that are produced). How can you prove that the SNR is from the 1054 A.D. SN? Observed radial velocities o ...
... as supernova remnants (SNRs). E.g. Crab Nebula (explosion in 1054 A.D. recorded by Chinese and Native Americans). Hundreds of these are known (see illustrations in book for the interesting forms that are produced). How can you prove that the SNR is from the 1054 A.D. SN? Observed radial velocities o ...
Star Of Wonder
... Was it a comet, an icy object that orbits our sun in long elliptical paths? A typical comet has a long dusty tail that can be spectacularly lit by sunlight and is visible for weeks as it works its way around the sun. But the Chinese, who were careful observers of such phenomena, didn't record any co ...
... Was it a comet, an icy object that orbits our sun in long elliptical paths? A typical comet has a long dusty tail that can be spectacularly lit by sunlight and is visible for weeks as it works its way around the sun. But the Chinese, who were careful observers of such phenomena, didn't record any co ...
Chapter 16
... overlying layers, in a spectacular explosion, that we know as a Supernova. The supernova explosion produces so much light that it can temporarily outshine an entire galaxy. The photons destroy the heavy nuclei through a process of photodisintegration to produce a flood of neutrinos. For all supernov ...
... overlying layers, in a spectacular explosion, that we know as a Supernova. The supernova explosion produces so much light that it can temporarily outshine an entire galaxy. The photons destroy the heavy nuclei through a process of photodisintegration to produce a flood of neutrinos. For all supernov ...
Star Life Cycle and classroom textbooks for research!
... You may type your answers directly within this document or in PowerPoint. Turn your assignment into the _DragNDrop folder when finished. 1. Give a short definition for the following terms using your own words. (1 pt. each) a. b. c. d. ...
... You may type your answers directly within this document or in PowerPoint. Turn your assignment into the _DragNDrop folder when finished. 1. Give a short definition for the following terms using your own words. (1 pt. each) a. b. c. d. ...
Protostar, Initial mass, Main Sequence
... Red dwarf stars with less than half a solar mass do not achieve red giant status they begin to fade as soon as their hydrogen fuel is exhausted. White dwarfs, planetary nebulae Our Sun, and any star with similar mass, will fuse to carbon and, possibly, oxygen and neon before shrinking to become a wh ...
... Red dwarf stars with less than half a solar mass do not achieve red giant status they begin to fade as soon as their hydrogen fuel is exhausted. White dwarfs, planetary nebulae Our Sun, and any star with similar mass, will fuse to carbon and, possibly, oxygen and neon before shrinking to become a wh ...
STARS- hot glowing sphere of gas that produces energy by
... STAR- hot glowing sphere of gas that produces energy by fusion 1] Light year—distance light travels in a year (9.5 trillion km, 6 trillion miles) 2] Star brightness A) Actual brightness- brightness right next to a star B) Apparent brightness—brightness as seen from earth 3] Formation of stars A) Neb ...
... STAR- hot glowing sphere of gas that produces energy by fusion 1] Light year—distance light travels in a year (9.5 trillion km, 6 trillion miles) 2] Star brightness A) Actual brightness- brightness right next to a star B) Apparent brightness—brightness as seen from earth 3] Formation of stars A) Neb ...
Lifecycle of a Star
... A white dwarf cools off over trillions of years until it no longer emits light ...
... A white dwarf cools off over trillions of years until it no longer emits light ...
Life Cycles of Stars
... massive explosion • Many nuclear fusion reactions occur and new elements form and explode into space • The debris from the explosion is the source for a new nebula • What remains of the star depends on the original size of the star ...
... massive explosion • Many nuclear fusion reactions occur and new elements form and explode into space • The debris from the explosion is the source for a new nebula • What remains of the star depends on the original size of the star ...
Northern Hemisphere – December 2012
... Its rings now cover around twice that diameter as they have now opened out to around 18-19 degrees from the line of sight, the greatest angle for six years. With a small telescope, you can see Saturn's southern hemisphere, the gap between its brightest rings and some of its moons. ...
... Its rings now cover around twice that diameter as they have now opened out to around 18-19 degrees from the line of sight, the greatest angle for six years. With a small telescope, you can see Saturn's southern hemisphere, the gap between its brightest rings and some of its moons. ...
Endpoints of Stellar Evolution
... • The masses are up to ~ 1.4 M = the Chandrasekhar limit • Beyond that mass, pressure cannot balance the gravity, and the star collapses into a neutron star or a black hole • Increasing the mass decreases the radius: R ~ M–1/3 • Typical composition: C and/or O • Neutron stars are the equivalen ...
... • The masses are up to ~ 1.4 M = the Chandrasekhar limit • Beyond that mass, pressure cannot balance the gravity, and the star collapses into a neutron star or a black hole • Increasing the mass decreases the radius: R ~ M–1/3 • Typical composition: C and/or O • Neutron stars are the equivalen ...
Section 25.2 Stellar Evolution
... Stars with masses similar to the sun evolve in essentially the same way as lowmass stars. During their collapse from red giants to white dwarfs, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called planetary nebula. ...
... Stars with masses similar to the sun evolve in essentially the same way as lowmass stars. During their collapse from red giants to white dwarfs, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called planetary nebula. ...
Nebula – • The most abundant element in the universe is hydrogen
... A star is a sphere of super-hot gases, mostly hydrogen and helium that is held together by its own gravity. No two stars contain exactly the same elements in the same proportions. Stars are born by contraction of gasses inside a nebula. ...
... A star is a sphere of super-hot gases, mostly hydrogen and helium that is held together by its own gravity. No two stars contain exactly the same elements in the same proportions. Stars are born by contraction of gasses inside a nebula. ...
SN 1054
SN 1054 is a supernova that was first observed on 4 July 1054 A.D. (hence its name), and that lasted for a period of around two years. The event was recorded in contemporary Chinese astronomy, and references to it are also found in a later (13th-century) Japanese document, and in a document from the Arab world. Furthermore, there are a number of proposed, but doubtful, references from European sources recorded in the 15th century, and perhaps a pictograph associated with the Ancestral Puebloan culture found near the Peñasco Blanco site in New Mexico.The remnant of SN 1054, which consists of debris ejected during the explosion, is known as the Crab Nebula. It is located in the sky near the star Zeta Tauri (ζ Tauri). The core of the exploding star formed a pulsar, called the Crab Pulsar (or PSR B0531+21). The nebula and the pulsar it contains are the most studied astronomical objects outside the Solar System. It is one of the few Galactic supernovae where the date of the explosion is well known. The two objects are the most luminous in their respective categories. For these reasons, and because of the important role it has repeatedly played in the modern era, SN 1054 is the best known supernova in the history of astronomy.The Crab Nebula is easily observed by amateur astronomers thanks to its brightness, and was also catalogued early on by professional astronomers, long before its true nature was understood and identified. When the French astronomer Charles Messier watched for the return of Halley's Comet in 1758, he confused the nebula for the comet, as he was unaware of the former's existence. Due to this error, he created his catalogue of non-cometary nebulous objects, the Messier Catalogue, to avoid such mistakes in the future. The nebula is catalogued as the first Messier object, or M1.