Stone Circles, Ireland. 6,000 year old Astronomical...
Transcript of Stone Circles, Ireland. 6,000 year old Astronomical...
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Stone Circles, Ireland. 6,000 year old Astronomical Calendars
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Newgrange, Ireland
Newgrange was constructed over 5,200 years ago, According to carbon-14 dates it was built about five hundred years before the Great Pyramid of Gizain Egypt and 1000 years before Stonehenge, England.
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Newgrange is best known for the illumination of its passage and chamber by the winter solstice sun.
Above the entrance to the passage at Newgrange there is a opening called a roof-box.
Its purpose is to allow sunlight to penetrate the chamber on the shortest days of the year, December 21, the winter solstice
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Roque de Los Muchachos Observatory,La Palma, Canary Islands
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When a galaxy’s central black hole pulls in material and glows, astronomers call it anActive Galactic Nucleus.
The black hole can weigh anywhere between a few million times our Sun’s mass to tens of billions of times our Sun’s mass.
A black hole’s extreme mass means it has a huge gravitational force that pulls in all material nearby —gas clouds or stars — to form a disk of gas and dust around the black hole.
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NASA – Kepler Space TelescopeKepler is a space observatory launched by NASA to:
1. Discover Earth-size planets orbiting other stars
2. Characterize their properties
3. Identify candidates that could harbor life
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Transit Technique
When a planet crosses in front of its star as viewed by an observer, the event is called a transit. Transits by terrestrial planets produce a small change in a star's brightness of about 1/10,000 (100 parts per million, ppm), lasting for 2 to 16 hours.
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1Summary of Kepler’s Amazing Results:
Planets about the size of the Earth that orbit in the Habitable Zone of their stars are common.4
Planets about the size of the Earth are the most common3
On average there is at least one planet for each star in our Galaxy
.
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Planets are diverse
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Extrasolar Planets• One Trillion Planets in our Galaxy
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1.4 Million Galaxies in this image. Approximately 100 Billion Galaxies in our Universe.
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Solano Community College Astronomy
- General Astronomy- Stars, Galaxies, and Cosmology
- Astronomy Laboratory
- Astrobiology
- Telescope making
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Neil deGrasse Tysonand the
Hayden Planetarium
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Modesto Community College planetarium and observatory
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