Learning Targets
... 1. I am able to state the characteristics used for classifying stars. 2. I know how to describe what a light-year is. 3. I know how to use a Hertzsprung-Russell diagram to classify stars. 15.3 Lives of Stars 4. I am able to state the life cycle of small and large stars. 15.4 Star Systems and Galaxie ...
... 1. I am able to state the characteristics used for classifying stars. 2. I know how to describe what a light-year is. 3. I know how to use a Hertzsprung-Russell diagram to classify stars. 15.3 Lives of Stars 4. I am able to state the life cycle of small and large stars. 15.4 Star Systems and Galaxie ...
Astronomy
... Big Bang Theory: the tremendously powerful explosion of an incredibly dense mass about 15-20 billion years ago that produced the expanding universe that exists today. Celestial object: something in space, such as a star or planet. Constellation: stars that appear to be grouped in patterns forming th ...
... Big Bang Theory: the tremendously powerful explosion of an incredibly dense mass about 15-20 billion years ago that produced the expanding universe that exists today. Celestial object: something in space, such as a star or planet. Constellation: stars that appear to be grouped in patterns forming th ...
21st Century Experiments in Cosmology
... – Constrain the dark energy equation of state and provide a dark matter map of the Universe through the measurement of the gravitational weak lensing effect (from the galaxy shear) ...
... – Constrain the dark energy equation of state and provide a dark matter map of the Universe through the measurement of the gravitational weak lensing effect (from the galaxy shear) ...
General Theory of Relativity
... in the habitable zone. We have not found extraterrestrial life yet, but due to Einstein’s explanation of gravitational lensing we are coming closer to it. Einstein added the cosmological constant to general relativity in 1917. Einstein, as many other scientists, wanted the Universe to be static. It ...
... in the habitable zone. We have not found extraterrestrial life yet, but due to Einstein’s explanation of gravitational lensing we are coming closer to it. Einstein added the cosmological constant to general relativity in 1917. Einstein, as many other scientists, wanted the Universe to be static. It ...
Document
... Hawking has a motor neurone disease, a condition that has progressed over the years. He is now almost entirely paralysed and communicates through a speech generating device. He married twice and has three children. ...
... Hawking has a motor neurone disease, a condition that has progressed over the years. He is now almost entirely paralysed and communicates through a speech generating device. He married twice and has three children. ...
Saloni
... Astronomers are now fairly sure that the Universe was born 15 billion years ago due to the Big Bang. ...
... Astronomers are now fairly sure that the Universe was born 15 billion years ago due to the Big Bang. ...
Lecture Thirteen (Powerpoint format) - Flash
... Major Astronomical News Item of the Week -Discovery of Gliese 581c Gliese 581c is the smallest extrasolar planet discovered to date, at about 5 times the mass of the Earth. It is believed based on models (not yet demonstrated by direct observation) that this could very well be a massive Earthli ...
... Major Astronomical News Item of the Week -Discovery of Gliese 581c Gliese 581c is the smallest extrasolar planet discovered to date, at about 5 times the mass of the Earth. It is believed based on models (not yet demonstrated by direct observation) that this could very well be a massive Earthli ...
Unit 11 Guide: Concepts of Earth Science Stars, Galaxies, and the
... Milky Way galaxy? 2. What evidence do scientists use to support the Big Bang Theory? Explain the sequence of events predicted by the Big Bang Theory. 3. Explain Hubble’s Law. 4. Compare and contrast the apparent and actual motion of stars. How can scientists know if a star or galaxy is moving toward ...
... Milky Way galaxy? 2. What evidence do scientists use to support the Big Bang Theory? Explain the sequence of events predicted by the Big Bang Theory. 3. Explain Hubble’s Law. 4. Compare and contrast the apparent and actual motion of stars. How can scientists know if a star or galaxy is moving toward ...
How many atoms make up the universe?
... density of the Universe should be close to the so-called critical density that separates an open universe that always grows from a closed universe that ultimately collapses again. • This critical mass density is currently equal to 9.9x10-27 kg/m3. (5.9 Hydrogen /m3) • 4.6% Atoms. More than 95% of th ...
... density of the Universe should be close to the so-called critical density that separates an open universe that always grows from a closed universe that ultimately collapses again. • This critical mass density is currently equal to 9.9x10-27 kg/m3. (5.9 Hydrogen /m3) • 4.6% Atoms. More than 95% of th ...
Rachel Henning
... Sun will start to run out. The helium will get squeezed. This will speed up the hydrogen burning. Our star will slowly puff into a red giant, which is a star that has exhausted it hydrogen and is burning helium fuel. It will eat all of the inner planets, even the Earth. Then the sun would burn into ...
... Sun will start to run out. The helium will get squeezed. This will speed up the hydrogen burning. Our star will slowly puff into a red giant, which is a star that has exhausted it hydrogen and is burning helium fuel. It will eat all of the inner planets, even the Earth. Then the sun would burn into ...
Gamma-Ray Bursts
... wide range of the electro-magnetic spectrum, from X-rays, over ultraviolet, optical, and infrared light, to radio wavelengths. This component has been extremely valuable for understanding the origin of GRBs and the galaxies in which they are located. We now know that GRBs originated from outside our ...
... wide range of the electro-magnetic spectrum, from X-rays, over ultraviolet, optical, and infrared light, to radio wavelengths. This component has been extremely valuable for understanding the origin of GRBs and the galaxies in which they are located. We now know that GRBs originated from outside our ...
TA`s solution set
... If the universe were also infinitely old, then light would have had time to reach us along all of these sightlines! (If the universe had finite age, the light from sufficiently distant stars would not have had time to reach us and some lines of sight would appear dark.) Since the night sky is, in fa ...
... If the universe were also infinitely old, then light would have had time to reach us along all of these sightlines! (If the universe had finite age, the light from sufficiently distant stars would not have had time to reach us and some lines of sight would appear dark.) Since the night sky is, in fa ...
Using Galaxy Clusters to Study Structure Evolution
... universe is expanding homogeneously and is not static. »The universe was denser in the past »The universe had a beginning….? ...
... universe is expanding homogeneously and is not static. »The universe was denser in the past »The universe had a beginning….? ...
Linking Asteroids and Meteorites through Reflectance Spectroscopy
... Sun out to the Sun’s orbit • Mass-to-Light ratio of our Sun is 1 solar mass per solar luminosity • So most matter is dimmer than the Sun ...
... Sun out to the Sun’s orbit • Mass-to-Light ratio of our Sun is 1 solar mass per solar luminosity • So most matter is dimmer than the Sun ...
Cosmological Inflation: a Personal Perspective
... electron gives a radius very close to the classical electron radius. The electron and the Universe have the same column density. ...
... electron gives a radius very close to the classical electron radius. The electron and the Universe have the same column density. ...
Marine Bio Lab CCR Notes Chapter 3
... According to nebular theory, Earth and other planets formed due to a process called accretion. The process by which matter became layered according to density during Earth’s formation, with heavier matter near the core and lighter material closer to the crust, is called density stratification. The m ...
... According to nebular theory, Earth and other planets formed due to a process called accretion. The process by which matter became layered according to density during Earth’s formation, with heavier matter near the core and lighter material closer to the crust, is called density stratification. The m ...
The Runaway Universe - Astronomy & Astrophysics Group
... “I have observed the nature and the material of the Milky Way. With the aid of the telescope this has been scrutinized so directly and with such ocular certainty that all the disputes which have vexed philosophers through so many ages have been resolved, and we are at last freed from wordy debates a ...
... “I have observed the nature and the material of the Milky Way. With the aid of the telescope this has been scrutinized so directly and with such ocular certainty that all the disputes which have vexed philosophers through so many ages have been resolved, and we are at last freed from wordy debates a ...
7_Big_bang
... galaxy. This is done by observing spectral lines (particular frequencies of light) from U and Th in the star light. This gives a direct radioactive age of these stars of 12 +/- 3 B. years. Three independent ways to date Universe: expansion rate, globular cluster red giants, and radioactive dating. A ...
... galaxy. This is done by observing spectral lines (particular frequencies of light) from U and Th in the star light. This gives a direct radioactive age of these stars of 12 +/- 3 B. years. Three independent ways to date Universe: expansion rate, globular cluster red giants, and radioactive dating. A ...
Phys 214. Planets and Life
... A second evidence that supports the Big Bang theory is the overall chemical composition of the Universe. Calculations predict that the composition of the Universe should be about three fourths hydrogen and one fourth helium by mass, being a closed match to the overall chemical composition of the uni ...
... A second evidence that supports the Big Bang theory is the overall chemical composition of the Universe. Calculations predict that the composition of the Universe should be about three fourths hydrogen and one fourth helium by mass, being a closed match to the overall chemical composition of the uni ...
Non-standard cosmology
A non-standard cosmology is any physical cosmological model of the universe that has been, or still is, proposed as an alternative to the Big Bang model of standard physical cosmology. In the history of cosmology, various scientists and researchers have disputed parts or all of the Big Bang due to a rejection or addition of fundamental assumptions needed to develop a theoretical model of the universe. From the 1940s to the 1960s, the astrophysical community was equally divided between supporters of the Big Bang theory and supporters of a rival steady state universe. It was not until advances in observational cosmology in the late 1960s that the Big Bang would eventually become the dominant theory, and today there are few active researchers who dispute it.The term non-standard is applied to any cosmological theory that does not conform to the scientific consensus, but is not used in describing alternative models where no consensus has been reached, and is also used to describe theories that accept a ""big bang"" occurred but differ as to the detailed physics of the origin and evolution of the universe. Because the term depends on the prevailing consensus, the meaning of the term changes over time. For example, hot dark matter would not have been considered non-standard in 1990, but would be in 2010. Conversely, a non-zero cosmological constant resulting in an accelerating universe would have been considered non-standard in 1990, but is part of the standard cosmology in 2010.