Jupiter - Friend or Foe
... that, even in a 100 Myr simulation, very few close encounters with the Earth would be expected even were the Earth greatly inflated. Therefore, in order to directly acquire the rate of impacts on the Earth, we would have had to simulate a vast number of test particles, many orders of magnitude highe ...
... that, even in a 100 Myr simulation, very few close encounters with the Earth would be expected even were the Earth greatly inflated. Therefore, in order to directly acquire the rate of impacts on the Earth, we would have had to simulate a vast number of test particles, many orders of magnitude highe ...
Direct Imaging Searches Around White Dwarfs - X
... • Original orbit ~2AU (max extent of AGB envelope) • WD progenitor 3.5Msun/B9V ...
... • Original orbit ~2AU (max extent of AGB envelope) • WD progenitor 3.5Msun/B9V ...
The Marine Sextant
... Use of the Sextant • A sextant is used to determine the sextant altitude (hs) of a celestial body. • First, we have to decide which stars to observe; this is done using a Rude Starfinder or other methods. • When making an observation, the star should look as shown in the next slide... ...
... Use of the Sextant • A sextant is used to determine the sextant altitude (hs) of a celestial body. • First, we have to decide which stars to observe; this is done using a Rude Starfinder or other methods. • When making an observation, the star should look as shown in the next slide... ...
Lecture26_Future
... "intelligent" Fraction of intelligent species of these planets that develop a desire to communicate w/ others Average or mean lifetime (in years) of a communicative ...
... "intelligent" Fraction of intelligent species of these planets that develop a desire to communicate w/ others Average or mean lifetime (in years) of a communicative ...
Other Planetary Systems - Colorado Mesa University
... A. It has a planet orbiting at less than 1 AU. B. It has a planet orbiting at greater than 1 ...
... A. It has a planet orbiting at less than 1 AU. B. It has a planet orbiting at greater than 1 ...
If you weighed 100 lbs on Earth, you would weigh 38 pounds on
... Even though both loaves are of the same amount, the smashed bread is *denser* because it is more compact. The Earth is 4.5 to 4.6 billion years old, but the oldest known rocks are less than 4 billion years old. Rocks older than 3 billion years are rare. The oldest fossils of living organisms are les ...
... Even though both loaves are of the same amount, the smashed bread is *denser* because it is more compact. The Earth is 4.5 to 4.6 billion years old, but the oldest known rocks are less than 4 billion years old. Rocks older than 3 billion years are rare. The oldest fossils of living organisms are les ...
Astronomical Geography: An Examination of the Early American
... book included only this short introductory paragraph on planetary satellites: "A satellite, or moon, is a body revolving round a planet, and, in company with the planet, round the sun . Of these there are 18 in our solar system, distributed in the following manner: 1 to Earth ; 4 to Jupiter; 7 to Sa ...
... book included only this short introductory paragraph on planetary satellites: "A satellite, or moon, is a body revolving round a planet, and, in company with the planet, round the sun . Of these there are 18 in our solar system, distributed in the following manner: 1 to Earth ; 4 to Jupiter; 7 to Sa ...
Chapter11.1
... • Rings aren’t leftover from planet formation because the particles are too small to have survived for so long. • There must be a continuous replacement of tiny particles. • The most likely source is impacts with jovian moons. © 2010 Pearson Education, Inc. ...
... • Rings aren’t leftover from planet formation because the particles are too small to have survived for so long. • There must be a continuous replacement of tiny particles. • The most likely source is impacts with jovian moons. © 2010 Pearson Education, Inc. ...
October 2016 BRAS Newsletter - The Baton Rouge Astronomical
... In addition to these events, I'd like to try to get a sidewalk astronomy event in place for either Wednesday or Thursday October 12th-13th. I scouted out Perkins Rowe and it looks like it would be excellent both view of the sky-wise and passersby-wise. It will ultimately depend on who gives us ...
... In addition to these events, I'd like to try to get a sidewalk astronomy event in place for either Wednesday or Thursday October 12th-13th. I scouted out Perkins Rowe and it looks like it would be excellent both view of the sky-wise and passersby-wise. It will ultimately depend on who gives us ...
Moons of the Solar System
... © 2007 Pearson Education Inc., publishing as Pearson Addison-Wesley ...
... © 2007 Pearson Education Inc., publishing as Pearson Addison-Wesley ...
Star-D_Teacher_Guide - The University of Texas at Dallas
... look at a map and suggest a location that is about the right distance from your town for Proxima Centauri on the model. You may wish to point out to the students that a map is a scale model, too. 2. How does the choice of Alpha Centauri A as the star from which the other distances are measured affec ...
... look at a map and suggest a location that is about the right distance from your town for Proxima Centauri on the model. You may wish to point out to the students that a map is a scale model, too. 2. How does the choice of Alpha Centauri A as the star from which the other distances are measured affec ...
Kuiper Belt, Oort Cloud and TNOs
... 1943: Astronomer Kenneth Edgeworth suggests that a reservoir of comets and larger bodies resides beyond the planets. 1950: Astronomer Jan Oort theorizes that a vast population of comets may exist in a huge cloud on the distant edges of our solar system. 1951: Astronomer Gerard Kuiper predicts the ex ...
... 1943: Astronomer Kenneth Edgeworth suggests that a reservoir of comets and larger bodies resides beyond the planets. 1950: Astronomer Jan Oort theorizes that a vast population of comets may exist in a huge cloud on the distant edges of our solar system. 1951: Astronomer Gerard Kuiper predicts the ex ...
Cataclysmic Cosmic Events and How to Observe Them www.springer.com/series/5338
... known; the former shine at us across billions of light-years due to the radiation from the nucleus of a galaxy surrounding a billion-solar-mass black hole. The latter, in the most violent cases, shine briefly but violently, the result of a single supermassive star disappearing from our universe into ...
... known; the former shine at us across billions of light-years due to the radiation from the nucleus of a galaxy surrounding a billion-solar-mass black hole. The latter, in the most violent cases, shine briefly but violently, the result of a single supermassive star disappearing from our universe into ...
The Astrobiology Primer - Mary Ann Liebert, Inc. publishers
... Contributors, authors, and editors are listed at the beginning, along with a list of those chapters and sections for which they were responsible. We are deeply indebted to the NASA Astrobiology Institute (NAI), in particular to Estelle Dodson, David Morrison, Ed Goolish, Krisstina Wilmoth, and Rose ...
... Contributors, authors, and editors are listed at the beginning, along with a list of those chapters and sections for which they were responsible. We are deeply indebted to the NASA Astrobiology Institute (NAI), in particular to Estelle Dodson, David Morrison, Ed Goolish, Krisstina Wilmoth, and Rose ...
Word Document - Montana State University Extended
... Scientists generally agree that the Earth formed about 4.5 billion years ago yet complex life has existed on the Earth for about the last 500 million years. It is still unclear exactly what chain of events lead up to the emergence of complex life on this planet. One of the factors that scientists be ...
... Scientists generally agree that the Earth formed about 4.5 billion years ago yet complex life has existed on the Earth for about the last 500 million years. It is still unclear exactly what chain of events lead up to the emergence of complex life on this planet. One of the factors that scientists be ...
The Astrobiology Primer
... has led to insights about the many connections between life and the atmosphere, oceans, and crust of Earth. Comparisons of geologic and atmospheric features on Earth, Mars, and Venus have provided insight into their different histories and what part life may or may not have played. Likewise, the gro ...
... has led to insights about the many connections between life and the atmosphere, oceans, and crust of Earth. Comparisons of geologic and atmospheric features on Earth, Mars, and Venus have provided insight into their different histories and what part life may or may not have played. Likewise, the gro ...
Venus Alex Jones
... Who- Nobody actually discovered venus, because it was so visible to the eye. ...
... Who- Nobody actually discovered venus, because it was so visible to the eye. ...
Star-S_Teacher_Guide - The University of Texas at Dallas
... o If your students have already done the Scale Model Solar System Activity, discuss the usefulness of the scale factor. Ask your students what the advantage would be of modeling stars on the same scale. By using the same scale factor of 1:10 billion, the students will more easily be able to make com ...
... o If your students have already done the Scale Model Solar System Activity, discuss the usefulness of the scale factor. Ask your students what the advantage would be of modeling stars on the same scale. By using the same scale factor of 1:10 billion, the students will more easily be able to make com ...
A History of Astronomy, Astrophysics and Cosmology
... The Earth was composed of the four elements of earth, air, fire and water, but there was a fifth pure element, the aether, which was the substance out of which the celestial bodies were made. This was the background against which the Ptolemaic geocentric system of the world was constructed. Accordin ...
... The Earth was composed of the four elements of earth, air, fire and water, but there was a fifth pure element, the aether, which was the substance out of which the celestial bodies were made. This was the background against which the Ptolemaic geocentric system of the world was constructed. Accordin ...
September 2007 - East Valley Astronomy Club
... Last Quarter Moon on September 3 at 19:33 New Moon on September 11 at 05:44 First Quarter Moon on September 19 at 09:48 Full Moon on September 26 at 12:45 ...
... Last Quarter Moon on September 3 at 19:33 New Moon on September 11 at 05:44 First Quarter Moon on September 19 at 09:48 Full Moon on September 26 at 12:45 ...
Definition of planet
The definition of planet, since the word was coined by the ancient Greeks, has included within its scope a wide range of celestial bodies. Greek astronomers employed the term asteres planetai (ἀστέρες πλανῆται), ""wandering stars"", for star-like objects which apparently moved over the sky. Over the millennia, the term has included a variety of different objects, from the Sun and the Moon to satellites and asteroids.By the end of the 19th century the word planet, though it had yet to be defined, had become a working term applied only to a small set of objects in the Solar System. After 1992, however, astronomers began to discover many additional objects beyond the orbit of Neptune, as well as hundreds of objects orbiting other stars. These discoveries not only increased the number of potential planets, but also expanded their variety and peculiarity. Some were nearly large enough to be stars, while others were smaller than Earth's moon. These discoveries challenged long-perceived notions of what a planet could be.The issue of a clear definition for planet came to a head in 2005 with the discovery of the trans-Neptunian object Eris, a body more massive than the smallest then-accepted planet, Pluto. In its 2006 response, the International Astronomical Union (IAU), recognised by astronomers as the world body responsible for resolving issues of nomenclature, released its decision on the matter. This definition, which applies only to the Solar System, states that a planet is a body that orbits the Sun, is massive enough for its own gravity to make it round, and has ""cleared its neighbourhood"" of smaller objects around its orbit. Under this new definition, Pluto and the other trans-Neptunian objects do not qualify as planets. The IAU's decision has not resolved all controversies, and while many scientists have accepted the definition, some in the astronomical community have rejected it outright.