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Astronomy 401 Lecture 1 Overview of the Universe 1 Class overview
Astronomy 401 Lecture 1 Overview of the Universe 1 Class overview

... point in its interior. Solid angles can also be measured in square degrees: 1 sr = (180/π)2 square degrees. Note: Most astronomers use CGS (centimeter-gram-second) units, instead of the MKS (meter-kilogramsecond) units you are used to from physics classes. We will mostly use MKS units in this class, ...
PHYSICS 1500 - The University of Sydney
PHYSICS 1500 - The University of Sydney

... impression of a ‘hot Jupiter’ – a giant planet in a very close orbit around its parent star. The first such planet discovered was 51 Pegasi b which takes 4.23 days to orbit a sun-like star. The system is about 50 light years from Earth. The planet was found using the radial velocity method for detec ...
Can we detect asteroid impacts with rocky extrasolar planets?
Can we detect asteroid impacts with rocky extrasolar planets?

... from our solar system seems daunting. However, that is not the end of the bad news. The fireball tends to mask itself so that not all of the light is emitted. This emissivity can drop to one percent or less depending on the characteristics of the impact. The good news is that Venus has a luminosity ...
Page 325 - ClassZone
Page 325 - ClassZone

... from Earth. Write an inequality that describes distances to points in space that are farther from Earth than Sirius is. Then graph the inequality. ASTRONOMY ...
Astronomy Exam #2 for the 10
Astronomy Exam #2 for the 10

... A mission like this would be superior to the original Hipparchus spacecraft in orbit around the Earth during the early 1990’s because, with the larger baseline of Jupiter’s orbit at 5.2 AU, all stars would have parallax angles about 5 times larger than those measured from Earth. Thus we would be abl ...
question sheet
question sheet

THE REASON FOR THE SEASONS OVERVIEW Program
THE REASON FOR THE SEASONS OVERVIEW Program

... Use a globe and gesture to introduce the vocabulary terms tilt and axis, the imaginary line between the North and South Poles. Then explain the following to students: The Earth rotates on an axis that is tilted. In other words, our planet never stands upright—it is always leaning to the side. The di ...
3-planets-of-the-solar-system
3-planets-of-the-solar-system

... 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 decrease in the brightness of Ogle-Tr-3 every 28.5 hours. The changing brightness is the r ...
6th Grade Great Barrier Reef
6th Grade Great Barrier Reef

... The Universe: Big and Getting Bigger!  Beyond the Milky Way, there are billions more stars in the galaxies that are our closest neighbors.  One of our close neighbors is the Andromeda galaxy, but don’t expect to travel there soon.  Even though Andromeda is closer to us than most other galaxies, i ...
Formation of the Solar System
Formation of the Solar System

... Hydrogen (H) Helium (He) ...
April 2016 - Newbury Astronomical Society
April 2016 - Newbury Astronomical Society

... which all the planets, including Earth, orbit the Sun. The solid black line marked as: ‘North Celestial Pole’ and ‘South Celestial Pole’ is the tilted axis of rotation of Earth. The angle between Solar System axis and the Celestial Axis (Earth’s axis of rotation) marked as: ‘Axial tilt or Obliquity’ ...
Note Taking Guide #2: Characteristics of Stars Welcome back! As
Note Taking Guide #2: Characteristics of Stars Welcome back! As

... in the night from a long distance away would appear to have similar apparent magnitudes. If they were a standard distance from the viewer, their absolute magnitudes would be the same as well. Held two different distances apart from the viewer, however, their apparent magnitudes would be different, b ...
History of Astronomy
History of Astronomy

... Aristarchus used the size of the Earth's shadow on the Moon during a lunar eclipse to estimate the relative size of the Earth and Moon. ...
runaway - Astronomy & Astrophysics Group
runaway - Astronomy & Astrophysics Group

... of them are rather large and quite bright, while the number of smaller ones is quite beyond calculation.” from The Starry Messenger (1610) ...
3-planets-of-the-solar-system
3-planets-of-the-solar-system

solar system form
solar system form

... Hydrogen, helium, and traces of lithium, the three lightest elements, were formed shortly after the creation of the universe. The heavier elements were produced much later by stars and are cast into space when stars die. By mass, 98% of the observed matter in the universe is hydrogen and helium. The ...
Gravity Kepler`s Laws - historical remarks - UW
Gravity Kepler`s Laws - historical remarks - UW

... Astronomia nova, Harmonices Mundi, and Epitome of Copernican Astronomy. They also provided one of the foundations for Isaac Newton's theory of universal gravitation. During his career, Kepler was a mathematics teacher at a seminary school in Graz, Austria, an assistant to astronomer Tycho Brahe, the ...
Physivd Preliminary Module 8.5 The Cosmic Engine
Physivd Preliminary Module 8.5 The Cosmic Engine

... relate the model of the solar system to the observed sky examine information collected to assist in predicting events such as appearances of comets, eclipses and other solar system phenomena.\ collate information gained from planetary research to support theories on the formation of the solar system ...
Introduction to the sky
Introduction to the sky

... If we draw a line from the zenith through a celestial object and extend that line to the horizon, we obtain the azimuth angle of the object. By convention, the north point on the horizon has azimuth 0 degrees, the east point has azimuth 90 degrees, the south point has azimuth 180 degrees, and the w ...
Introduction to the sky
Introduction to the sky

... If we draw a line from the zenith through a celestial object and extend that line to the horizon, we obtain the azimuth angle of the object. By convention, the north point on the horizon has azimuth 0 degrees, the east point has azimuth 90 degrees, the south point has azimuth 180 degrees, and the w ...
29 Jan: Maps of the Sky
29 Jan: Maps of the Sky

... for 2010: 221,600 miles or 356,600 km, 7 % less than its average distance. This will make the full Moon appear slightly larger than usual. “ ...
Outline of Lecture on Copernican Revolution: 1. Source of word
Outline of Lecture on Copernican Revolution: 1. Source of word

... An ellipse is one member of a family of curves, called conic sections. Newton showed that the most general orbits are conic sections, either circles, ellipses, parabolae, or hyperbolae. To do this, he needed to invent the calculus; one of the greatest mathematical advances of all time. ...
The Origin of the Solar System
The Origin of the Solar System

... solar wind and light pressure Comets come close to the Sun from the outer parts of the solar system and are icy leftovers from planet formation. This means that at least parts of the solar nebula were rich in ices ...
Precession of the Equinoxes and its Importance in Calendar Making
Precession of the Equinoxes and its Importance in Calendar Making

Astronomy Unit - rachaelreeves
Astronomy Unit - rachaelreeves

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Astronomical unit

The astronomical unit (symbol au, AU or ua) is a unit of length, roughly the distance from the Earth to the Sun. However, that distance varies as the Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once a year. Originally conceived as the average of Earth's aphelion and perihelion, it is now defined as exactly 7011149597870700000♠149597870700 meters (about 150 million kilometers, or 93 million miles). The astronomical unit is used primarily as a convenient yardstick for measuring distances within the Solar System or around other stars. However, it is also a fundamental component in the definition of another unit of astronomical length, the parsec.
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