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Question 2 (7-1 thru 7-4 PPT Questions)
Question 2 (7-1 thru 7-4 PPT Questions)

... 5. For Mercury and Venus, which do not possess any natural satellites, accurate determinations of their respective masses had to await orbiting or flyby space probes. ...
Solar System where_are_we
Solar System where_are_we

... Because we dwell within the Milky Way Galaxy, it is impossible for us to take a picture of its spiral structure from the outside. But we do know that our Milky Way has a spiral nature from observations made from within our Galaxy (though whether or not it is a barred spiral is still being debated). ...
BROCK UNIVERSITY Return both the exam script
BROCK UNIVERSITY Return both the exam script

... (b) the Moon is closer to the Sun, and the greater heat “boiled” its atmosphere away. (c) Earth has life, and the Moon does not. (d) the Earth has greater mass, and therefore greater surface gravity. 20. The Sun (a) is much like other average stars. (b) is much larger and hotter than other average s ...
A stars
A stars

... Around Sirius (Spectral type A1: 26 times more luminous than the Sun), an Earth-sized planet would have to orbit at about the distance of Jupiter from the star. Around Epsilon Indi (Spectral type K5: about one-tenth the Sun's luminosity), an Earth-sized planet would have to orbit at about the distan ...
370KB - NZQA
370KB - NZQA

... Check that the National Student Number (NSN) on your admission slip is the same as the number at the top of this page. You should attempt ALL the questions in this booklet. If you need more room for any answer, use the extra space provided at the back of this booklet and clearly number the question. ...
An exceptional planetary system discovered in Cassiopeia by
An exceptional planetary system discovered in Cassiopeia by

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STARS

Introduction to Earthquakes EASA-193, Fall 2001 - Home
Introduction to Earthquakes EASA-193, Fall 2001 - Home

... The differentiation of the Earth into a metallic core surrounded by a silicate mantle probably occurred over a time space of 10-30 millions years. ...
Ch 28 Vocab cnp
Ch 28 Vocab cnp

... Chapter 28: Stars and Galaxies A halo of gases that is formed by the expelled layers of a star’s atmosphere The brightness of a star The measure of how bright a star would be if it were located 10 parsecs from Earth A group of millions, or even billions of stars held together by gravity A unit of me ...
Chapter 17 Packet Pages
Chapter 17 Packet Pages

... Lesson 2 – What patters can you see in the sky? Page 500-505 1. Why are we able to see the Moon? ...
Class 11 and 12 lecture slides (giant planets)
Class 11 and 12 lecture slides (giant planets)

... • Giant planets primarily composed of H,He with a ~10 Me rock-ice core which accreted first • They radiate more energy than they receive due to gravitational contraction (except Uranus!) • Clouds occur in the troposphere and are layered according to condensation temperature • Many (>1000) extra-sola ...
Chapter 1: Origin of the earth
Chapter 1: Origin of the earth

... the rate of retreat, we can calculate that all the pieces must have been together about 14 Ga ago. For some time after the Big Bang, the universe consisted only of gaseous hydrogen and helium – there were no stars or galaxies. All other elements were created during the life and death of stars. Norma ...
In this chapter we briefly review the origin of the Earth, from the Big
In this chapter we briefly review the origin of the Earth, from the Big

Integrative Studies 410 Our Place in the Universe
Integrative Studies 410 Our Place in the Universe

... – The year is the rotation period of the Earth around the Sun – The year is subdivided into months, the period of the Moon around the Earth – The weeks seven days are named after the seven bodies in the solar system known in ...
Stars Galaxies Sun
Stars Galaxies Sun

Ch. 28 Test Topics
Ch. 28 Test Topics

... -Be able to describe the Big Bang theory says the universe began as a huge explosion between 10 billion and 20 billion years ago. -Know that all matter and energy started in a space smaller than the nucleus of an atom and that this space is called a singularity. ...
Jupiter
Jupiter

... observation of this phenomenon until the twentieth century. In any case, it varies greatly both color and intensity. The images obtained by the Yerkes Observatory in the late nineteenth century show an elongated red spot, occupying the same range of latitudes but with twice the longitudinal extensio ...
What Makes a Planet Habitable?
What Makes a Planet Habitable?

... Young Sun Paradox”. Most popular are different admixtures of efficient greenhouse gases that may have kept the atmosphere sufficiently warm. Larger amounts of carbon dioxide would be the easiest explanation, but geological evidence in minerals argues against the required amounts. Other greenhouse ga ...
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File

Chapter 13
Chapter 13

How did our solar system get here?
How did our solar system get here?

... • Orbits the Sun in 248 years, and makes one full rotation in 6 hours 7minutes. Also has not made it fully around the Sun since it was discovered in 1930. • Between 1979 and 1999, Pluto was closer to the Sun than Neptune; this gave us a good opportunity for study this planet and it’s moon. • Not con ...
Document
Document

Observation & Inference - East Hanover Schools Online
Observation & Inference - East Hanover Schools Online

... meteor, meteorite, meteoroid? The Quick Trick: Oids are outside the atmosphere, ites are inside it, and meteors are in between. ...
Announcements
Announcements

... the solar system is due to the Sun (most of the mass) l  But the other planets in the Solar System tug on each other and cause the planets to wobble in their orbits l  If you calculate the effects of all of the other planets on Neptune’s wobble, it’s not enough l  Either the universal law of grav ...
Glossary - Sky Science
Glossary - Sky Science

... the path of one body around another. In our solar system, each planet has its own distinctive orbit around the sun, and moons orbit most of the planets. The orbits of all the planets are slightly elliptical. Pluto's orbit is so eccentric, however, that for periods of time it is actually inside the o ...
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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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