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the solar system - HMXEarthScience
the solar system - HMXEarthScience

... Base your answers to questions 79 and 80 on the passage below. A Newly Discovered Planet Scientists studying a Sun-like star named Ogle-Tr-3 discovered a planet that is, on the average, 3.5 million kilometers away from the star’s surface. The planet was discovered as a result of observing a cyclic ...
How Do We Know the Earth is Spherical?
How Do We Know the Earth is Spherical?

Chapter 6 - Formation of the Solar System
Chapter 6 - Formation of the Solar System

... Exceptions to these rules in our Solar System challenge our theory. Theory also challenged by discovery of other solar systems around other stars within last 20 years. ...
Planets in the Sky
Planets in the Sky

Dear Teachers - Jeffrey Bennett
Dear Teachers - Jeffrey Bennett

... a few clear trends (such as differences between the sizes and distances of the 4 inner planets compared to those of the 4 outer planets) so that you have a good picture of the solar system. ...
Standard EPS Shell Presentation
Standard EPS Shell Presentation

The Milky Way
The Milky Way

... • in the same direction • in the same plane (like planets do) • they “bobble” up and down • this is due to gravitational pull from the disk • this gives the disk its thickness ...
Mar 2017 - What`s Out Tonight?
Mar 2017 - What`s Out Tonight?

... The planets are best observed with a telescope using magnifithat were born out of the same nebula cloud. A group often forms cations from 50x to 200x. The five naked-eye planets are Mera pretty pattern. The Pleiades and Praesepe are great examples. cury, Venus, Mars, Jupiter and Saturn. Venus is ext ...
Planets
Planets

...  Terrestrial planets farther from the Sun should be lower in density (closest should be the most dense)  Terrestrial planets farther from the Sun should have a smaller core/mantle ratio (closest should be largest) ...
Earth_Universe04
Earth_Universe04

... • Massive stars use fuel faster and exist for only a few million year • Small stars use fuel slowly and exist for perhaps hundreds of billions of years • 90% of a star's life is in the main-sequence ...
Unit 11: Astronomy
Unit 11: Astronomy

... 2. Solar size units In this section, we will use the diameter of the sun to represent a unit of 1. We will call this unit the sun size unit. diameter of the sun = 1,392,000 km = 1 sun size unit = 1 SSU We can compare the size of other objects to the sun using the sun size unit. 1. How many sun size ...
ph507lecnote07
ph507lecnote07

... arcsec corresponds to 1 AU) EXAMPLE: Sirius: Also known as Alpha Canis Majoris, Sirius is the fifth closest system to Sol, at 8.6 light-years. Sirius is composed of a main-sequence star and a white dwarf stellar remnant. They form a close binary, Alpha Canis Majoris A and B, that is separated "on av ...
Setting the Stage for Habitable Planets
Setting the Stage for Habitable Planets

... Sun-like stars that have more frequent flares also have larger irradiance variations on multiple timescales [25], likely causing larger climate variations. Ionizing radiation and stellar winds can remove the atmosphere from an Earth-like planet in the CHZ of a low mass star, but the timescale for it ...
Standard EPS Shell Presentation
Standard EPS Shell Presentation

... Describe how the composition and size of planets is related to their formation and proximity to the sun. Identify the structure of the Milky Way Galaxy and the location of our solar system within the galaxy. Explain how astronomers measure the distance to stars and ...
No Slide Title
No Slide Title

Stars - Trimble County Schools
Stars - Trimble County Schools

... Star • A star is a body of gases that gives off a tremendous amount of radiant energy in the form of light and heat • Appear to be tiny specks of white light • Most vary in color and are much larger than Earth ...
The Copernican Revolution
The Copernican Revolution

... • "If you have two theories which both explain the observed facts then you should use the simplest until more evidence comes along“ • "The simplest explanation for some phenomenon is more likely to be accurate than more complicated explanations.“ • KISS (instructor’s editorial comment) ...
Study Guide for 1ST Astronomy Exam
Study Guide for 1ST Astronomy Exam

...  Describe the three basic ingredients of the “cosmic cupboard” and how these three ingredients and the thermal structure of the solar nebula create the distribution of planets that we see in our solar system.  Describe the steps in the formation of solar system (33.2 to 33.5 1. Interstellar cloud ...
Kepler`s laws - FSU High Energy Physics
Kepler`s laws - FSU High Energy Physics

...  increase of temperature and pressure in its center; when temperature and pressure high enough, “nuclear fusion” process starts; “radiation pressure” due to nuclear fusion stops gravitational collapse; ...
What`s Up, Earth?
What`s Up, Earth?

... 3) Show the location on the globe of the North and South poles, and have students mark the locations of the poles on their “globes.” Show students the location of the equator on the globe, and have them mark the equator on their models. 4) Through demonstrations with the globe and experiments with ...
The Solar System - Junta de Andalucía
The Solar System - Junta de Andalucía

... Activity 12. Read this text and check the information you have just completed Revolution The Earth revolves around the Sun in orbit, at the same time that it rotates on its axis. It takes one year and six hours for the Earth to complete its orbit around the Sun. As a result, every four years we have ...
Photosynthetic Potential of Planets in 3:2 Spin Orbit
Photosynthetic Potential of Planets in 3:2 Spin Orbit

... Mercury itself is unlikely to be habitable, as it lacks an atmosphere and is subject to temperatures in the range 100 700°C (Prockter, 2005). However, as this orbital resonance exists within our own Solar System, it could be that such a spin-orbit dynamic is to be found elsewhere. Mercury's capture ...
Cosmic Quest field guide.
Cosmic Quest field guide.

... somewhat similar to the Moon. In contrast, most of the northern hemisphere consists of plains which are much younger, lower in elevation and have a much more complex history. An abrupt elevation change of several kilometers seems to occur at the boundary. The reasons for this global abrupt boundary ...
What is a Scientist? - Cockeysville Middle School
What is a Scientist? - Cockeysville Middle School

Sun, Earth, and Moon
Sun, Earth, and Moon

... Where does the moon get its light from? What percent of the earth is always lit by the sun? How many stars are in our solar system? How many days does it take for the Earth to revolve around the sun? • How many low and high tides on Earth every 24 hours? ...
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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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