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The Moon and the Sun: 2003 version
The Moon and the Sun: 2003 version

... gibbous Moon.  When the moon is less than half-lit, it is called a crescent Moon. ...
Motion of the Moon Phases of the Moon
Motion of the Moon Phases of the Moon

... faces the Sun is lit up • The lit portion of the Moon’s surface which is visible from Earth is called the phase • Phases change in a regular sequence over a 29.5 day ...
An Introduction to Astronomy and Cosmology
An Introduction to Astronomy and Cosmology

... • It was discovered that the brightest (first magnitude) were about 100 times brighter than the faintest (sixth magnitude) • This was made a definition. – 5 magnitudes = a factor of 100 in brightness – So a star of 1st magnitude is exactly 100 times brighter than one of 6th magnitude. ...
RFS_multiple_choice_Dec8_Key
RFS_multiple_choice_Dec8_Key

... B. They are all objects for which the first detailed study was carried out by the Mauna Kea Observatory in Hawaii C. Objects which lie within 5 degrees on either side of the ecliptic, and are hence occulted by the moon at some time or the other. D. All of them lie in the Milky Way band of the sky (t ...
Lecture 7 Phys 1810
Lecture 7 Phys 1810

... • Tidal forces: cause distortion of an object by pull of another object. • Can occur when – Objects close (e.g. Earth & Moon) – 1 object is very massive (e.g. Jupiter & Io; Sun & Earth.) ...
a MS Word version.
a MS Word version.

... "weird" about the transition from the liquid hydrogen mantle of Jupiter to its gaseous hydrogen atmosphere? What is metallic liquid hydrogen and how is it related to Jupiter's and Saturn's strong magnetic fields? Both Jupiter and Saturn give off more energy than they receive from the Sun. What are t ...
Apparent size (apparent diameter)
Apparent size (apparent diameter)

... 1. The changing angle of insolation completes one full cycle per year. a. Intensity of insolation (maximum at solar noon): i. Solar noon insolation in the northern hemisphere increases from December 21st through June 21st. This is opposite in the southern hemisphere. ii. Solar noon insolation in the ...
Part 2 - Hewlett
Part 2 - Hewlett

... 6. What are the characteristics of these planets? _________________________________________ Venus 7. Which planet is most similar in size to Earth? __________________________________________ Venus 8. Which planet has a longer day than year? ____________________________________________ Saturn 9. Whic ...
UCCS Solar Energy ENSC/PES 1600 Fall 2010 Earth, Sun, Time
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... 15) What kind of time can be read directly from a sundial? A) apparent solar time B) mean solar time C) standard time D) daylight saving time E) sidereal time 16) All the following statements are true. Which one explains why mean solar time differs from apparent solar time? A) The length of a solar ...
Curriculum Development Unit Overview DRAFT Planning For Each
Curriculum Development Unit Overview DRAFT Planning For Each

... HS-ESS1-1. Develop a model based on evidence to illustrate the life span of the sun and the role of nuclear fusion in the sun’s core to release energy that eventually reaches Earth in the form of radiation. HS-ESS1-2. Construct an explanation of the Big Bang theory based on astronomical evidence of ...
cont. - UNLV Physics
cont. - UNLV Physics

... B.  Galaxies may exist at that distance, but their light would be too faint for our telescopes to see." C.  Because looking 15 billion light-years away means looking to a time before the universe existed." ...


... 2. Had you been on Earth around the time of its formation (a few tens of millions of years after the Sun's), would the Sun then look brighter or fainter than it does today? The Sun on the Main Sequence 3. Is the Sun currently getting brighter, or fainter? 4. Once temperatures at Earth's surface reac ...
Chapter 1 Our Place in the Universe
Chapter 1 Our Place in the Universe

... On a small scale, the force of gravity has drawn matter together forming galaxies, stars formed inside the galaxies and planets formed around some of those stars. The only two chemical elements created during the Big Bang were hydrogen and helium The rest of the elements heavier than H and He are ge ...
Star Classification and its Connection to Exoplanets.
Star Classification and its Connection to Exoplanets.

... already been collected, and now this data will be interpreted. Based on the data, a star’s spectral classification influences its capability to host planets. More specifically, through hypothesis testing, stars similar to the sun tend to host planets more often than other stars: a conclusion that is ...
Pre-Final Quiz Answers
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... Our Universe is vast. By counting the number of galaxies we can see over very small sample areas of the sky and then extrapolating to cover the whole celestial sphere, we come to an estimate of the total number of galaxies in our Universe. How many? At least 200-400 billion. ...
A short history of astronomy and telescopes
A short history of astronomy and telescopes

... TMT Science • the first epoch of star formation in the Universe • the assembly and evolution of galaxies • the discovery and characterization of extra solar planets • fundamental physics of dark matter and dark energy ...
http://earthquake.usgs.gov/learning/facts.php
http://earthquake.usgs.gov/learning/facts.php

... 1. T or F? One’s weight changes in outer space. Weight is dependent on gravity – gravity is dependent in part upon the distance between two objects (getting weaker with greater distance) – in outer space distance between objects (you & planet, you and star) increases, therefore weight decreases ...
Chapter 29 Notes
Chapter 29 Notes

... – Apparent magnitude: how bright the star appears from Earth – Absolute magnitude: how bright a star would look if it were 10 parsecs away ...
Comets, asteroids, and meteors oh my!
Comets, asteroids, and meteors oh my!

... – Seen once only 76 years – Last seen in 1986 – Next time we will see Halley’s comet will be around 2062 this is a prediction ...
Reading Science Gravity 6.11B 2
Reading Science Gravity 6.11B 2

... between you and Earth, between Earth and the Moon, and between Earth and the Sun. Even though you can’t feel it, the gravitational attraction between you and Earth is what keeps your feet planted firmly on the ground. Imagine spinning around and around on a merry-go-round. As long as you are holding ...
Chapter 16 Lesson 2: What is a Star
Chapter 16 Lesson 2: What is a Star

... Elliptical galaxies are round or oval looking like footballs. 1. The largest galaxies know are elliptical, but there are also elliptical galaxies that are smaller than the Milky Way. d. Some galaxies are called irregular because they are not spiral or elliptical and do not have a definite shape. 1. ...
The ancient Greeks were first to propose
The ancient Greeks were first to propose

... the heliocentric model must be correct. The Earth is now placed as the third planet moving around the Sun. The new heliocentric model was no more accurate than the system of Ptolemy, in part because Copernicus still had circular orbits. Tycho Brahe was a late 16th century Danish nobleman who carrie ...
pptx
pptx

... Many extrasolar planets have now been discovered (see later) Heavy element content of stars with planets systematically higher than typical sample, though some low-heavy-element stars do have planets ...
Position in Solar System ppt
Position in Solar System ppt

... of the formation of the universe is the Big Bang Theory. The theory states that the universe originated sometime between 10 billion and 20 billion years ago from an enormous explosion of a small volume of matter at extremely high density and temperature. ...
Slide 1
Slide 1

... of the formation of the universe is the Big Bang Theory. The theory states that the universe originated sometime between 10 billion and 20 billion years ago from an enormous explosion of a small volume of matter at extremely high density and temperature. ...
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Extraterrestrial life



Extraterrestrial life is life that does not originate from Earth. It is also called alien life, or, if it is a sentient and/or relatively complex individual, an ""extraterrestrial"" or ""alien"" (or, to avoid confusion with the legal sense of ""alien"", a ""space alien""). These as-yet-hypothetical life forms range from simple bacteria-like organisms to beings with civilizations far more advanced than humanity. Although many scientists expect extraterrestrial life to exist, so far no unambiguous evidence for its existence exists.The science of extraterrestrial life is known as exobiology. The science of astrobiology also considers life on Earth as well, and in the broader astronomical context. Meteorites that have fallen to Earth have sometimes been examined for signs of microscopic extraterrestrial life. Since the mid-20th century, there has been an ongoing search for signs of extraterrestrial intelligence, from radios used to detect possible extraterrestrial signals, to telescopes used to search for potentially habitable extrasolar planets. It has also played a major role in works of science fiction. Over the years, science fiction works, especially Hollywood's involvement, has increased the public's interest in the possibility of extraterrestrial life. Some encourage aggressive methods to try to get in contact with life in outer space, whereas others argue that it might be dangerous to actively call attention to Earth.
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