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Moro_Martin`s Talk - CIERA
Moro_Martin`s Talk - CIERA

... Quick Tour to Star and Planet Formation Stars form in clouds of dust and gas. Local density increase occurs within these clouds that portion of the cloud contracts in on itself under its own gravitational pull a protostar is formed (no fusion yet). By conservation of angular momentum, what is left ...
star - TeacherWeb
star - TeacherWeb

... • Band extends from cool, dim, red stars at the lower right to hot, bright, blue stars at the upper left  known as Main Sequence. • Stars within this band are called main sequence stars. ie. Sun ...
Wonderful eclipses
Wonderful eclipses

... existence of complex life. We narrow our consideration only to those three bodies involved in producing total solar eclipses on the Earth. First, strong arguments can be given for the necessity of a star similar to the Sun (see Gonzalez 1999). This establishes the physical size of the eclipsed body, ...
Part 1 - Cura
Part 1 - Cura

... physical properties do explicitly depend on the Ecliptical longitude and geographical latitude, though from the physical point of view they mustn’t. Thus, in a series of experiments being conducted in 50-ies by Prof. G. Piccardi and his colleagues [9, 10], the rate of definite chemical reactions was ...
Darwin – A Mission to Detect, and Search for Life on, Extrasolar
Darwin – A Mission to Detect, and Search for Life on, Extrasolar

... between star and planet occurs. The baseline mission lasts 5 years and consists of approximately 200 individual target stars. Among these, 25 to 50 planetary systems can be studied spectroscopically, searching for gases such as CO2, H2O, CH4 and O3. Many of the key technologies required for the cons ...
Venus
Venus

globular cluster - Harding University
globular cluster - Harding University

... the gas and dust clouds in the plane of the galaxy. ...
Charcteristic of Stars Powerpoint C
Charcteristic of Stars Powerpoint C

4P38.pdf
4P38.pdf

... that the solar high-energy flux was about 3 times the present value 2.5 Gyr ago and about 6 times the present value about 3.5 Gyr ago (when life arose on Earth). In summary, compelling observational evidence indicates that the Sun underwent a much more active phase in the past. The enhanced activity ...
J: Chapter 3: The Solar System
J: Chapter 3: The Solar System

... happened. A cloud of material in this nebula was rotating slowly in space. A nearby star might have exploded, and the shock waves from this event could have caused the cloud to start contracting. As it contracted, the matter in the cloud was squeezed into less space. The cloud’s density became great ...
Solutions3
Solutions3

... Bo − Bs = 0.036Bo , and (Bo − Bp )/(Bo − Bs ) = 26.94. The fourth root of this is 2.28, which gives the temperature difference between the two stars. (Note that without further information we can’t distinguish which star, A or B, is hotter.) Problem 3: You observe a 1.5% drop in the light from a sta ...
Document
Document

The Outer Planets and Their Moons
The Outer Planets and Their Moons

... will fall into Saturn, similar to satellites orbiting the Earth, which eventually crash to the Earth’s surface. • What causes the intricate ring structure, including gaps and spokes? Gravitational forces from moons and moonlets embedded in the rings are the source of intricate ring structure. Voyage ...
FREE Sample Here
FREE Sample Here

... The celestial equator, an imaginary line around the sky above Earth’s equator, divides the sky into northern and southern halves. Astronomers often refer to angular distances “on” the sky as if the stars, sun, moon, and planets were equivalent to spots painted on a plaster ceiling. These angular dis ...
FREE Sample Here - We can offer most test bank and
FREE Sample Here - We can offer most test bank and

... The celestial equator, an imaginary line around the sky above Earth’s equator, divides the sky into northern and southern halves. Astronomers often refer to angular distances “on” the sky as if the stars, sun, moon, and planets were equivalent to spots painted on a plaster ceiling. These angular dis ...
FREE Sample Here
FREE Sample Here

... The celestial equator, an imaginary line around the sky above Earth’s equator, divides the sky into northern and southern halves. Astronomers often refer to angular distances “on” the sky as if the stars, sun, moon, and planets were equivalent to spots painted on a plaster ceiling. These angular dis ...
The Search for Another Earth
The Search for Another Earth

Grade 5 Unit 6
Grade 5 Unit 6

... In this unit of study, students explore the effects of gravity and determine the effect that relative distance has on the apparent brightness of stars. They also collect and analyze data in order to describe patterns of daily changes in length and direction of shadows, day and night, and the seasona ...
Gravity-mod
Gravity-mod

... • Almost all of our neighbors in space are in orbit around something: • All of the planets are in a circular or elliptical orbit around the Sun. • Our moon and the moons of the other planets are in orbit around their planets. • Comets are in an irregular orbit around the Sun. • Most asteroids in our ...
Ch 28-31 Lessons
Ch 28-31 Lessons

... 5. Of the orbits that you drew, which loop size and what color created the most eccentric (oval) ellipse? (Hint – the one with the biggest # in Column 5.) _______________________________________________________________ 6. Look at Appendix J on p. 921. There is a row labeled Orbital eccentricity. Loo ...
Stars - MrCrabtreesScience
Stars - MrCrabtreesScience

... • Pressure from the core balance pressure from above layers, particles don’t move. • Energy bounces around inside this layer for an average of 170,000 years. • 7-2,000,000 K ...
Astronomy Today 7th Edition Chaisson/McMillan
Astronomy Today 7th Edition Chaisson/McMillan

... Summary of Chapter 15 • The solar system is orderly, not random; need formation theory that explains this. • Condensation theory is the current favorite—large cloud of interstellar gas and dust starts to collapse, the Sun forms at the center, and dust particles act as accretion nuclei to form the p ...
Venus is the Roman goddess of love and beauty. She is known as
Venus is the Roman goddess of love and beauty. She is known as

... called the "morning star" or the "evening star." It is by far the brightest "star" in the sky. ~ Venus is a small, rocky planet blanketed in a thick layer of yellowish clouds. These clouds are not made of water (like the ones here on Earth). Instead, they are formed from a poison called sulphuric ac ...
Our Fun Sun - Environmental Science Institute
Our Fun Sun - Environmental Science Institute

... The diameter of the sun is approximately 1,391,000 km. Earth’s diameter is only about 12,750 km. Comparing the Sun’s diameter to other celestial bodies, you can see that the sun is huge. Scientists have also approximated the mass of the sun which can help find the gravitational force that the sun e ...
3Nov_2014
3Nov_2014

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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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