Galaxy - Bama.ua.edu
... Use of the time machine • Finite speed of light creates a time machine. • The sun is 8 light minutes away, we see the sun as it was 8 minutes ago. • The nearest star, 4LY away, as it was 4 years ago. • Andromeda galaxy as it was about 2 million yr ago. • If we look ~14 billion LY away, expect to se ...
... Use of the time machine • Finite speed of light creates a time machine. • The sun is 8 light minutes away, we see the sun as it was 8 minutes ago. • The nearest star, 4LY away, as it was 4 years ago. • Andromeda galaxy as it was about 2 million yr ago. • If we look ~14 billion LY away, expect to se ...
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... billion years to reach the WMAP satellite from its origin in the infant universe, and in that time, the seeds of matter have evolved into the universe of galaxies, stars and planets that we see today. One misconception that this animation can generate is that flying away from Earth will allow us to ...
... billion years to reach the WMAP satellite from its origin in the infant universe, and in that time, the seeds of matter have evolved into the universe of galaxies, stars and planets that we see today. One misconception that this animation can generate is that flying away from Earth will allow us to ...
Lecture - Ann Arbor Earth Science
... In our example, the top band is our Sun, while the bottom band represents the spectrum of a star that is moving away from the Earth. Notice how the entire pattern of black lines has been shifted toward the red end of the spectrum. If the bottom band had been a star that is moving toward the Earth, t ...
... In our example, the top band is our Sun, while the bottom band represents the spectrum of a star that is moving away from the Earth. Notice how the entire pattern of black lines has been shifted toward the red end of the spectrum. If the bottom band had been a star that is moving toward the Earth, t ...
How Big is the Universe
... the sky than are visible to the naked eye. Later, astronomers learned they were part of the Milky Way Galaxy. They also observed many fuzzy, cloudy looking patches. They were called nebulae. This is the Latin word for clouds. Some of them appeared to be giant clouds of gas and dust inside the Milky ...
... the sky than are visible to the naked eye. Later, astronomers learned they were part of the Milky Way Galaxy. They also observed many fuzzy, cloudy looking patches. They were called nebulae. This is the Latin word for clouds. Some of them appeared to be giant clouds of gas and dust inside the Milky ...
PHYSICS 1500 - ASTRONOMY TOTAL: 100 marks Section A Please
... Briefly describe the physical characteristics (approximate size, composition,…) of these key astrophysical ‘objects’. ...
... Briefly describe the physical characteristics (approximate size, composition,…) of these key astrophysical ‘objects’. ...
Slide 1
... Fortunately, while we cannot correct a single planet’s mass for this effect, on average, it is not too bad for a sample of exoplanets: Only a 33% chance of a planet being more than 2× the inferred mass; Only a 13% chance of a planet being more than 5× the inferred mass; Only a 6% chance of a planet ...
... Fortunately, while we cannot correct a single planet’s mass for this effect, on average, it is not too bad for a sample of exoplanets: Only a 33% chance of a planet being more than 2× the inferred mass; Only a 13% chance of a planet being more than 5× the inferred mass; Only a 6% chance of a planet ...
Chapter 1 - Chabot College
... Suppose that, at this very moment, students are studying astronomy on planets in Andromeda. Could they know that we exist here on Earth? A. Yes, because we can see stars in Andromeda, so they can see us in the Milky Way. B. No, the light from the solar system has not yet reached Andromeda. C. No, th ...
... Suppose that, at this very moment, students are studying astronomy on planets in Andromeda. Could they know that we exist here on Earth? A. Yes, because we can see stars in Andromeda, so they can see us in the Milky Way. B. No, the light from the solar system has not yet reached Andromeda. C. No, th ...
This lecture covers the origins of the Universe, Sun and our planet
... Penzias and Wilson, working at Bell Labs near Princeton, they were annoyed with the background noise they were seeing with their giant radio telescope. It was microwave radiation with a 3 K signal. Everywhere they pointed it existed. They tried to find all sorts of artifacts that may explain i ...
... Penzias and Wilson, working at Bell Labs near Princeton, they were annoyed with the background noise they were seeing with their giant radio telescope. It was microwave radiation with a 3 K signal. Everywhere they pointed it existed. They tried to find all sorts of artifacts that may explain i ...
Unit 1
... cultures all over the world have connected the dots to draw figures from them, much like seeing figures in passing clouds. We call these traditional groupings of stars "constellations." Are these stars physically ...
... cultures all over the world have connected the dots to draw figures from them, much like seeing figures in passing clouds. We call these traditional groupings of stars "constellations." Are these stars physically ...
universe
... • Distance of objects ( Far more difficult) Some galaxies look much smaller and fainter than others, showing they may be much further away. The Andromeda galaxy is 2.3 million light years away. That is, we are seeing it as it was 2.3 million years ago. In recent decades, astronomers have detected ga ...
... • Distance of objects ( Far more difficult) Some galaxies look much smaller and fainter than others, showing they may be much further away. The Andromeda galaxy is 2.3 million light years away. That is, we are seeing it as it was 2.3 million years ago. In recent decades, astronomers have detected ga ...
The Distribution of Stars Most Likely to Harbor Intelligent Life
... T for an M star (e.g., 1,000 Gyr) is much greater than Ti since Ti is limited by the age of the Galaxy (10 Gyr). The solar system coincidence could be rephrased - why don’t we find ourselves around a more typical star? Figure 1 shows that most intelligent life should arise around stars of mass ≈ 1 M ...
... T for an M star (e.g., 1,000 Gyr) is much greater than Ti since Ti is limited by the age of the Galaxy (10 Gyr). The solar system coincidence could be rephrased - why don’t we find ourselves around a more typical star? Figure 1 shows that most intelligent life should arise around stars of mass ≈ 1 M ...
Chapter 1 Our Place in the Universe
... the expansion rate and the history of the expansion rate which has changed) and contains over 100 billion galaxies with a total number of stars comparable to the number of grains of sand on all of Earth’s beaches • How do our lifetimes compare to the age of the universe? – On a cosmic calendar that ...
... the expansion rate and the history of the expansion rate which has changed) and contains over 100 billion galaxies with a total number of stars comparable to the number of grains of sand on all of Earth’s beaches • How do our lifetimes compare to the age of the universe? – On a cosmic calendar that ...
AS 60 - Astronomy of the Americas
... 2. How can you tell if a galaxy is moving toward us, or away from us? a. As you watch it over the course of a year, an approaching galaxy will appear to grow larger in angular size on the sky b. Spectral lines of elements will be observed in the galaxy’s spectrum at greater wavelengths than those fo ...
... 2. How can you tell if a galaxy is moving toward us, or away from us? a. As you watch it over the course of a year, an approaching galaxy will appear to grow larger in angular size on the sky b. Spectral lines of elements will be observed in the galaxy’s spectrum at greater wavelengths than those fo ...
Objects In Space -- research questions
... of our solar system. Pay close attention to the sizes of your planets compared to each other, the outer planets and the sun. Answer the following questions: 1. What are the names of the 4 inner planets, in order from the sun (closest to ...
... of our solar system. Pay close attention to the sizes of your planets compared to each other, the outer planets and the sun. Answer the following questions: 1. What are the names of the 4 inner planets, in order from the sun (closest to ...
Which of the following is the best description of an Sc galaxy? A) a
... Why can't we see radiation produced during the first 300,000 years of the history of the universe? A) it was all absorbed and destroyed soon after it was emitted B) it hasn't reached us yet C) it has been deflected by black holes D) it passed by our part of the universe a few billion years ago ...
... Why can't we see radiation produced during the first 300,000 years of the history of the universe? A) it was all absorbed and destroyed soon after it was emitted B) it hasn't reached us yet C) it has been deflected by black holes D) it passed by our part of the universe a few billion years ago ...
Detection Technique for Artificially-Illuminated Objects in the Outer
... We first examine the feasibility of this new SETI technique within the Solar System, which offers the best prospects for detecting intrinsically faint sources of light. The flux reaching an observer from any self-luminous source varies according to the familiar inverse square law, but the flux from ...
... We first examine the feasibility of this new SETI technique within the Solar System, which offers the best prospects for detecting intrinsically faint sources of light. The flux reaching an observer from any self-luminous source varies according to the familiar inverse square law, but the flux from ...
1. Put these objects in the correct order, from nearest
... Suppose that, at this very moment, students are studying astronomy on planets in Andromeda. Could they know that we exist here on Earth? A. Yes, because we can see stars in Andromeda, so they can see us in the Milky Way. B. No, the light from the solar system has not yet reached Andromeda. C. No, th ...
... Suppose that, at this very moment, students are studying astronomy on planets in Andromeda. Could they know that we exist here on Earth? A. Yes, because we can see stars in Andromeda, so they can see us in the Milky Way. B. No, the light from the solar system has not yet reached Andromeda. C. No, th ...
Exam 3 Study Guide
... This guide is meant to assist with studying for Exam 3 on March 27, 2017. However, it is not comprehensive. This guide includes topic which might not be on this exam (but which might be on the final). It is also possible that something not specifically mentioned on the guide may be on the exam. Howe ...
... This guide is meant to assist with studying for Exam 3 on March 27, 2017. However, it is not comprehensive. This guide includes topic which might not be on this exam (but which might be on the final). It is also possible that something not specifically mentioned on the guide may be on the exam. Howe ...
Infinity Express
... MS-ESS1- Analyze and interpret data to determine scale properties of objects in the solar ...
... MS-ESS1- Analyze and interpret data to determine scale properties of objects in the solar ...
7_Big_bang
... M31 is made out of lots of stars just like our own Milky Way! We are but one of very many galaxies! Stars were very dim. This implied M31 is very far away. Of order 3 million light years! [Note, today we think of this distance as a very close neigbor.] Read discussion and debate in the Perfect Machi ...
... M31 is made out of lots of stars just like our own Milky Way! We are but one of very many galaxies! Stars were very dim. This implied M31 is very far away. Of order 3 million light years! [Note, today we think of this distance as a very close neigbor.] Read discussion and debate in the Perfect Machi ...
Planetary System Formation, Extrasolar Planets, Life in the Universe
... If all stars (in some mass range) have on average 2 planets with R = Rearth orbiting between 0.5 au and 1.5 au, ~50 will be detected. Likely to provide first clue as to how common habitable planets are. Possible that gravitational lensing (even less direct method, discussed next semester) will find ...
... If all stars (in some mass range) have on average 2 planets with R = Rearth orbiting between 0.5 au and 1.5 au, ~50 will be detected. Likely to provide first clue as to how common habitable planets are. Possible that gravitational lensing (even less direct method, discussed next semester) will find ...
March 2017 - Shasta Astronomy Club
... where all the objects were in the fields, separated stars from distant background galaxies (stars are point sources, whereas most galaxies are slightly extended), and then looked for places where there were more stars than expected — hoping some might be faint Milky Way satellites. In the constellat ...
... where all the objects were in the fields, separated stars from distant background galaxies (stars are point sources, whereas most galaxies are slightly extended), and then looked for places where there were more stars than expected — hoping some might be faint Milky Way satellites. In the constellat ...
Word doc - UC-HiPACC - University of California, Santa Cruz
... 847 and counting: that’s the number of planets confirmed as existing around 642 stars within several hundred light-years of our Sun. And more than 2,000 additional detections are awaiting confirmation by follow-up observations. By far, the most potential exoplanets have been found by the NASA spacec ...
... 847 and counting: that’s the number of planets confirmed as existing around 642 stars within several hundred light-years of our Sun. And more than 2,000 additional detections are awaiting confirmation by follow-up observations. By far, the most potential exoplanets have been found by the NASA spacec ...
~Crowfoot
... yourself thinking or talking about at odd times? What do you wish I’d asked on this exam? What do you think will stick with you after you’ve left SLU? ...
... yourself thinking or talking about at odd times? What do you wish I’d asked on this exam? What do you think will stick with you after you’ve left SLU? ...
answers2004_05_BC - Particle Physics and Particle Astrophysics
... In what respects are the discovered planets similar to those of the solar system? almost all systems have only one giant planet, and very few indeed have more than 2 (cf. Jupiter and much smaller Saturn in solar system) planets are discovered around stars with heavy element content similar to or ...
... In what respects are the discovered planets similar to those of the solar system? almost all systems have only one giant planet, and very few indeed have more than 2 (cf. Jupiter and much smaller Saturn in solar system) planets are discovered around stars with heavy element content similar to or ...
Fermi paradox
The Fermi paradox (or Fermi's paradox) is the apparent contradiction between high estimates of the probability of the existence of extraterrestrial civilizations, such as in the Drake equation, and the lack of evidence for such civilizations. The basic points of the argument, made by physicists Enrico Fermi and Michael H. Hart, are: The Sun is a typical star, and there are billions of stars in the galaxy that are billions of years older. With high probability, some of these stars will have Earth-like planets, and if the earth is typical, some might develop intelligent life. Some of these civilizations might develop interstellar travel, a step the Earth is investigating now. Even at the slow pace of currently envisioned interstellar travel, the Milky Way galaxy could be completely traversed in about a million years.According to this line of thinking, the Earth should already have been visited by extraterrestrial aliens though Fermi saw no convincing evidence of this, nor any signs of alien intelligence anywhere in the observable universe, leading him to ask, ""Where is everybody?""