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TAP702-0: Red shift - Teaching Advanced Physics
TAP702-0: Red shift - Teaching Advanced Physics

... either side of the nucleus at the locations indicated in the diagram. The gas on one side of the galaxy is strongly red shifted and on the other side blue-shifted, showing that the disc is rotating at a speed of about 550 km s–1. Note that M87 itself does not rotate – the centre part does. ...
The Earth – a Celestial Body
The Earth – a Celestial Body

Kepler File
Kepler File

... distance between each sphere depends upon the choice of the first sphere, the RELATIVE distance between the sphere will depend upon the size of the regular solids. So no matter what size sphere we begin with, the relative distance between the spheres will remain the same. Kepler found to his great d ...
Astrology
Astrology

... professionally-prepared charts, characteristics were reversed. Astrologers and their clients could not tell the difference. ...
Astrology
Astrology

Astrology
Astrology

... •Note the characteristics of the signs and the planets •Note the positions of the planets within the houses •Note the aspects of planets ...
Red Dwarf Stars: Ages, Rotation, Magnetic
Red Dwarf Stars: Ages, Rotation, Magnetic

The Copernican revolution - University of Florida Astronomy
The Copernican revolution - University of Florida Astronomy

... explanation for planetary motion? • Their inability to observe stellar parallax was a major factor. •If the Earth was in orbit around the Sun we should see nearby stars changing position when the Earth move in its orbit ...
Document
Document

DTU_9e_ch15
DTU_9e_ch15

... that observations reveal the presence of significant mass in the Milky Way that astronomers have yet to identify that there is a massive black hole at the center of our Galaxy ...
Spagna
Spagna

Fomalhaut b
Fomalhaut b

... main
sequence
star
at
7.7
pc.
 •  Fomalhaut
b
is
between
a
Neptune
and
a
Jupiter
in
mass.
 •  Excellent
system
for
detailed
study
the
dynamics
between
planets
and
 planetesimals.
 •  The
unusual
brightness
of
Fomalhaut
b
at
op)cal
wavelengths
indicates
 that
we
may
be
seeing
circumplanetary
dust
rin ...
Lab Script
Lab Script

... allow you to change your altitude and azimuth of where you’re looking. Play with it to get used to what your “world” looks like. In the very upper-left corner is your tool selection tool. By default, SN opens in adaptive mode which allows you to click and drag around the scene, and brings up informa ...
October 2014 - Newbury Astronomical Society
October 2014 - Newbury Astronomical Society

... Stars were originally classified in groups designated by a letter in sequence from ‘A’ through the alphabet. The original sequence was defined by the apparent age of the star. Later this sequence was found to be wrong. However the class letters for each kind of star were retained but now they are no ...
Lec01_ch01_night_sky
Lec01_ch01_night_sky

... the day, we’ve developed time zones • We’ve also marked a grid of Latitude and Longitude to describe positions on the Earth – similar to Right Ascension/Declination, but fixed to the Earth (Prime Meridian in Greenwich England) rather than the distant stars 31 Aug 2000 ...
The Search for Exoplanets - Worcester Polytechnic Institute
The Search for Exoplanets - Worcester Polytechnic Institute

... coined in the early 1990s. Exoplanets come in a wide variety of sizes and compositions - some being large gas giants like Jupiter or Saturn, while others are small and rocky, like Earth and Mars. Exoplanets are almost always found to be gravitationally bound to a stellar system, however, there is at ...
Stars PowerPoint
Stars PowerPoint

... • The Sun contains most of the mass in the solar system and is made up primarily of hydrogen and helium. • Astronomers learn about conditions inside the Sun by a combination of observation and theoretical models. • The Sun’s atmosphere consists of the photosphere, the chromosphere, and the corona. • ...
SECTION28.1 Formation of the Solar System
SECTION28.1 Formation of the Solar System

... Despite this core, Venus has no measurable magnetic field, probably because of its slow rotation, equivalent to 243 Earth days. ...
Homework #3, AST 203, Spring 2010
Homework #3, AST 203, Spring 2010

... moon orbiting it! Observations with Hubble show that this moon (called Dysnomia) makes an almost circular orbit around Eris with a period of 15.8 Earth days. The semi-major axis of the orbit subtends an angle of 0.5300 as seen from Earth. Calculate the semi-major axis in kilometers, and calculate th ...
Earth Science Multiple-Choice Question Analyses - MTEL
Earth Science Multiple-Choice Question Analyses - MTEL

... Correct Response: D. The scientist's conclusion would be undermined if the uncontaminated test wells were found to be drawing water from a different aquifer than the contaminated confined aquifer that supplies the drinking-water well. The test wells that are up-gradient from the drinking water well ...
Celestial Motions
Celestial Motions

... approaches in our society, and now is the time to explore our more intimate, sympathetic, and emotional nature and how these affect our decision-making processes. Thoughts of the past can be especially prominent during this period. We might think of past events in new ways. While Mercury is retrogra ...
Word - Lyon College
Word - Lyon College

... star, at a distance of about 10 stellar radii. That's less than one-tenth the size of Mercury's orbit in our solar system. "In a two-day orbit, it's about 200 degrees Celsius too hot for liquid water," Butler said. "That tends to lead us to the conclusion that the most probable composition of this t ...
2nd Planet from the Sun
2nd Planet from the Sun

... Venusian year (period of revolution) = 225 days Venusian day (period of rotation) = 243 days A day on Venus is longer than a year! It is ~ the same size as Earth (7200 miles in diameter) but slightly less dense ...
The Story of Planet Building
The Story of Planet Building

... Building Task: Create a book that illustrates the story of how our solar system formed. Guidelines & Expectations ___/2 pts.-Title page that includes a title and your name ___/2 pts.- Minimum of 8 pages ___/6 pts.- Book is in correct chronological order ___/6 pts.- All significant steps in the forma ...
“Here Comes the Sun” How the new
“Here Comes the Sun” How the new

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Rare Earth hypothesis



In planetary astronomy and astrobiology, the Rare Earth Hypothesis argues that the origin of life and the evolution of biological complexity such as sexually reproducing, multicellular organisms on Earth (and, subsequently, human intelligence) required an improbable combination of astrophysical and geological events and circumstances. The hypothesis argues that complex extraterrestrial life is a very improbable phenomenon and likely to be extremely rare. The term ""Rare Earth"" originates from Rare Earth: Why Complex Life Is Uncommon in the Universe (2000), a book by Peter Ward, a geologist and paleontologist, and Donald E. Brownlee, an astronomer and astrobiologist, both faculty members at the University of Washington.An alternative view point was argued by Carl Sagan and Frank Drake, among others. It holds that Earth is a typical rocky planet in a typical planetary system, located in a non-exceptional region of a common barred-spiral galaxy. Given the principle of mediocrity (also called the Copernican principle), it is probable that the universe teems with complex life. Ward and Brownlee argue to the contrary: that planets, planetary systems, and galactic regions that are as friendly to complex life as are the Earth, the Solar System, and our region of the Milky Way are very rare.
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