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Deep Space Objects
Deep Space Objects

Ch2a
Ch2a

... The Elevation of the North Pole Star The north pole star is always at an elevation, or altitude, a, above the northern horizon, that is equal to the latitude, of the observer. Circumpolar stars are stars which are always in view. They never set below the horizon. All stars with declinations  ...
Special Relativity:
Special Relativity:

... of light towards and away from a star was thought to be: V = c + v where v equals 29 km/s, and c = 300,000 km/s. MM felt they could detect this difference. ...
The Origin of Our Solar System
The Origin of Our Solar System

... young stars. • Modern astronomical tools can image the disks directly and evidence is strong that our own planetary system formed in such a disk ...
Motion of Objects in Space
Motion of Objects in Space

... asteroid) that revolves around a star 2. Giant ball of burning gas held together by gravity 3. Rocky object that orbits sun and is smaller than asteroid 4. Small chunk of ice, dust, and rocky material 5. A piece of space rock that strikes earth ...
AP Physics Multiple Choice Practice – Gravitation 1. Each of five
AP Physics Multiple Choice Practice – Gravitation 1. Each of five

... 25. Two artificial satellites, 1 and 2, are put into circular orbit at the same altitude above Earth’s surface. The mass of satellite 2 is twice the mass of satellite 1. If the period of satellite 1 is T, what is the period of satellite 2? (A) T/2 (B) T (C) 2T (D) 4T 26. A planet has a radius one-ha ...
Search for Life in the Universe – What can we Learn from our own
Search for Life in the Universe – What can we Learn from our own

... Alternatively, a cold scenario has been proposed for the origin of life. According to Trinks et al. (2005) a sea ice reactor would consist of a dynamic three phase system of ice crystals, brine channels and gas bubbles with dynamic temperature gradients and energy transport. In laboratory experiment ...
Planets in different environments
Planets in different environments

Astronomy Syllabus - Jefferson Forest High School
Astronomy Syllabus - Jefferson Forest High School

... Students will complete all work individually and on time. All homework is due when the tardy bell rings. If it is not turned in at that time, it is considered to be late. Work for other classes may NOT be completed in my classroom. All other work will be confiscated and returned at the END of class. ...
leo 1. episode 1
leo 1. episode 1

... The names of extra-solar planets are derived by using the name of the star they orbit followed by a number indicating the planet’s position in order of distance from said star. Thus, planet Aldebaran-4 is the fourth planet of the star Aldebaran. Aldebaran-4 being the only habitable planet of the sys ...
Constellations
Constellations

... Asterism: Smaller groups of stars that form patterns within a constellation, from the Greek word aster, meaning star ...
PowerPoint Presentation - No Slide Title
PowerPoint Presentation - No Slide Title

... • Kepler believed the Copernican model and sought to prove that it was correct using Brahe’s data for the positions of the planets. • He found that – Planets orbit in elliptical paths (not circles!) with the Sun at one focus of the ellipse. – A line from the Sun to a planet will sweep out the same a ...
The Moon and the Sun: 2003 version
The Moon and the Sun: 2003 version

...  When it is getting smaller, the Moon is waning.  When the Moon is more than half-lit, it is called a gibbous Moon.  When the moon is less than half-lit, it is called a crescent Moon. ...
Universe Now - Course Pages of Physics Department
Universe Now - Course Pages of Physics Department

... – The planets are orbiting in the same direction (also the rotation direction of the Sun), and most of them rotate in the same direction (except Venus and Uranus). – Different estimations of age: according to radiometric dating of meteorites, the age is at least 4.56 billion years; whereas, based on ...
Ch 22-2
Ch 22-2

... o Moon’s rotation and revolution around Earth are the same • Same side of the moon always faces the Earth • This is where the dark side of the moon comes from o Only satellites and astronauts have seen the other side of the moon o More cratered than the side facing the Earth • Same side of the moon ...
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DO PHYSICS ONLINE SPACE MOTION OF SATELLITES

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sidereal day

Our Place in Universe
Our Place in Universe

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Extrasolar planets Topics to be covered Planets and brown dwarfs

... resembles that of the Sun: who’s to say that Jupiter is not simply a “failed star” rather than a planet? • The discovery of low-mass binary stars would be interesting, but (perhaps) not as exciting as discovering new “true” planets. • Is there a natural boundary between planets and stars? ...
2.7 - 2.9a
2.7 - 2.9a

... His eye is Aldebaran (a large star) ...
Exploring the Solar System - Rourke Publishing eBook Delivery
Exploring the Solar System - Rourke Publishing eBook Delivery

... planets have many differences. A thick, swirling atmosphere surrounds Venus. The pressure of this atmosphere is 90 times the pressure on Earth. This pressure is so high that it would crush metal. The atmosphere is mostly carbon dioxide, a gas that traps heat from the Sun. With temperatures of nearly ...
Introduction This book will teach you all you need to know about the
Introduction This book will teach you all you need to know about the

... round. The second is that it must orbit the sun. The third and final characteristic is that it must clear its neighborhood of everything. That means that when asteroids hit earth or other planets that is the planets way of clearing it neighborhood. All of the eight planets have done those three thin ...
Completing the Census of Exoplanetary Systems with
Completing the Census of Exoplanetary Systems with

... • A complete census is likely needed to understand planet formation and evolution. – Most giant planets likely formed beyond the snow line. – Place our solar system in context. – Water for habitable planets likely delivered from beyond the snow line. – Understand the frequency of planet formation in ...
Physics@Brock - Brock University
Physics@Brock - Brock University

... • What is stellar parallax? When was it first observed? • What were some counterarguments to Aristarchus’s proposal that the Sun is at the centre of the universe? • What is the diameter-distance relation for astronomical objects? How can you use it to determine the diameter of an astronomical object ...
Ellipses, Parallax, and Retrograde Motion
Ellipses, Parallax, and Retrograde Motion

... 2. How can you determine the latitude of Anchorage (or any place on Earth) using just your hands and a clear night sky? 3. Discuss the difference between what we see (apparent) and what is real (actual) with relation to retrograde motion or parallax. 4. Draw or describe a shape with an eccentricity ...
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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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