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E1 Introduction to the universe
E1 Introduction to the universe

... the matter could be found in Massive Astronomical Compact Halo Objects or MACHOs for short. There is some evidence that lots of ordinary matter does exist in these groupings. These can be thought of as low-mass failed stars or high-mass planets. They could even be black holes. These would produce li ...
Lecture 15a - Sierra College Astronomy Home Page
Lecture 15a - Sierra College Astronomy Home Page

... 0.5 million years (fast robot probes, fastest biological exploration) 5 million years (slow robot probes) 50 million years (slow biological exploration) 10 billion years Instead, it would be vastly more likely that if even one other civilization EVER occurred in our galaxy, it would have had billion ...
CONSTELLATION CASSIOPEIA named after the
CONSTELLATION CASSIOPEIA named after the

... • Rho Cassiopeiae is a semi-regular pulsating variable yellow-hued supergiant star about 10,000 light-years from Earth but among the most luminous stars in the galaxy with a luminosity of approximately 500,000 solar luminosities. It has a minimum magnitude of 6.2 and a maximum magnitude of 4.1; its ...
printer-friendly version of benchmark
printer-friendly version of benchmark

... far as 2000 light years (http://www.uwgb.edu/dutchs/CosmosNotes/distance.htm). Figure 4 is a chart of some of the nearest stars to Earth. After the Sun, Proxima Centauri is closest to Earth at 4.2 light years. Dividing this value by the distance between Earth and Sun (4.2 light years / 1.58 x 10-5 l ...
Standard Four: Earth in Space
Standard Four: Earth in Space

... Essential Question: What predictable, observable patterns occur as a result of the interaction between the Earth, Moon, and Sun? Essential Question: How has technology expanded our knowledge of the Earth, Moon, and Sun System.? Enduring Understanding: There are observable, predictable patterns of mo ...
Earth Science Chap.2 Sect. 2
Earth Science Chap.2 Sect. 2

... the sun. The sun’s rays strike the earth at a 90º angle along the Tropic of Capricorn. This occurs on December 21st or 22nd each year and marks the beginning of winter in the Northern Hemisphere. The northern Hemisphere has the fewest daylight hours and the sun follows its lowest path across the sky ...
Semester 2 Course Review
Semester 2 Course Review

... What evidence is used to develop the Big Bang Theory? What evidence is used to verify the Big Bang Theory? What is cosmic background radiation (CBR) and how was it discovered? How does the proposal of the existence of dark matter and dark energy demonstrate the creative nature of science when constr ...
L8 Condensation
L8 Condensation

... therefore along a condensation sequence in which the most refractory elements condense in the inner regions of the nebula while volatile elements condense only at larger distance (outside the icelines). In order to compute which elements condense where, we assume that changes in temperature and dens ...
Spring 2012 - Union College
Spring 2012 - Union College

... and time. The outer part of the blue circle is marked with days of the year, while the outer part of the grey overlay is marked with times. The stars within the grey oval are the ones visible on a particular day at the time that lines up with that day. To see the sky at a different date and time, si ...
The Final Flight of Atlantis - Westchester Amateur Astronomers
The Final Flight of Atlantis - Westchester Amateur Astronomers

... even a truck driving by the observatory can overwhelm the effect of a genuine gravitational wave. Figuring out how to isolate LIGO from so much terrestrial noise has been a major undertaking, but after years of work the LIGO team has done it. Since 2006, LIGO has been ready to detect gravitational w ...
HR Diagram
HR Diagram

... __________________________________________________________________________________________ __________________________________________________________________________________________ 9. If star Large and star Small were the same temperature, explain why Large would appear brighter. __________________ ...
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... sustained for long as new observations will knock down incorrect ideas. Takes time! Leads to Theory! “Real” World ...
Earth, Moon, and Sky - Wayne State University
Earth, Moon, and Sky - Wayne State University

... of the solar day over the course of the year A mean solar day contains exactly 24 hours and is what we use in everyday time-keeping It is inconvenient for practical purposes because it is determined by the position of the Sun Noon occurs when the Sun is located overhead This implies that noon happen ...
Oct - Seattle Astronomical Society
Oct - Seattle Astronomical Society

... boom. Clouds of interstellar gas within the two galaxies press against one another and collapse to form stars, dozens to hundreds at a time. This isn’t the first time astronomers have witnessed a galaxy producing so many stars. “There are some other extreme starburst ...
earth science
earth science

... The Marcellus shale is a black shale formation that was formed during the Middle Devonian Period. The shale extends from New York State as far south as Alabama. The Marcellus shale is exposed at the surface in the northern Finger Lakes region, and is buried 2.1 kilometers below the surface along the ...
CONSTELLATION TUCANA, THE TOUCAN
CONSTELLATION TUCANA, THE TOUCAN

... magnitude of 2.87. It marks the toucan's head. It is an orange subgiant of spectral type K3III around 199 light-years distant from the Solar System. A cool star with a surface temperature of 4300 K, it is 424 times as luminous as the sun and 37 times its diameter. It is 2.5 to 3 times as massive. Al ...
Way Milky the MAPPING
Way Milky the MAPPING

... The difference is important: astronomers develop theories of star motions not only to analyze how the stars in the galaxy are moving but also to understand how our galaxy—and others like it— formed and evolved. The paper came out as the European Space Agency was preparing for the December launch of ...
3 Nightly Motions
3 Nightly Motions

... For a star rising in northeastern sky:  Stars first rise in the northeast, rise very high into the sky as they approach the meridian, and then set in the northwestern sky. ...
SR Stellar Properties
SR Stellar Properties

... 8. If Rigel and Betelgeuse were the same size, explain why Rigel would appear brighter. __________________________________________________________________________________________ __________________________________________________________________________________________ 9. If star Large and star Smal ...
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... There are two types of Cepheids, with two different period-luminosity relationships. Hubble had unknowingly used the wrong relationship. Like measuring with a Yardstick when he should have used ...
ISP205 Spring 2001 Exam #1 Study Guide
ISP205 Spring 2001 Exam #1 Study Guide

... Know the difference between Geocentric - Earth centered - and Heliocentric - Sun centered models of the solar system. Ptolemy devised a successful Earth centered model based on circles and epicycles. Why was the Ptolemy’s system accepted? It worked pretty well. Contributions of Galileo: Sun spots, M ...
Celestia DATA WORKSHEET
Celestia DATA WORKSHEET

... program will leave Io and travel very fast to the sun, which will be centered in the screen with thousands of actual stars as a backdrop. 6. Zoom in on the sun by pressing the “Home” key on the keyboard several times. Home always zooms in. Press End to zoom out. Zoom in on the sun until at least 2/3 ...
EXPLORE: Where do meteorites come from
EXPLORE: Where do meteorites come from

... but every other planet, moon and rock has it’s own gravity which does it’s best to pull anything smaller in. When there’s two objects with a decent sized gravity (such as the Earth and the moon), they don’t crash into each other, they keep each other at arms length because they’re also caught up in ...
Lab #1 - Lat & Long
Lab #1 - Lat & Long

... Run North to South; they measure a distance east or west of the Prime Meridian. Where to put the prime meridian? Greenwich, England here because at the time England was the head of the scientific community. Before there were many meridians that longitude was based off of. The Prime Meridian was used ...
Slide 1
Slide 1

... A storm that Jupiter has is known as the Red Spot. This red spot is actually a huge storm that has been raging on Jupiter for at least 400 years. Although the Great Red Spot is the most famous feature of Jupiter, it is just one part of the complex atmosphere of the giant planet. The distinctive colo ...
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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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