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Distance to Stars
Distance to Stars

... 40 trillion km from the sun. (more than 260,000AU) • Light takes 4.2 years to reach Earth. ...
Why the sun is important too!
Why the sun is important too!

... regulates our sleep/wake cycle and triggers our bodies for activity or restful sleep. 4. Warmth Life on this planet would not be possible without the warmth that the sun provides. Mercury and Venus have temperatures much hotter than most earthly organisms could handle. If any water existed on these ...
The Solar System
The Solar System

... condensing established the protosun as a star and it became our Sun. – Between the orbits of Mars and Jupiter there is an Asteroid belt that some think was formed by the breakup of a larger planet. ...
Formation of the Solar System The Solar System
Formation of the Solar System The Solar System

... • Theory that best explains properties of Earth and Moon is “giant impact” between early Earth and a Mars-sized object in a similar orbit. ...
TOPIC 14 – MOTIONS OF EARTH, MOON, SUN
TOPIC 14 – MOTIONS OF EARTH, MOON, SUN

... 40. Earth’s orbit is a slightly eccentric ellipse. Eccentricity means the degree of ovalness of an ellipse or how far it is from being a circle. Does our slightly elliptical orbit cause the seasons? _________________________ 41. Seasonal changes are evidence for revolution because as earth travels i ...
Observing the Planets
Observing the Planets

... of Earth’s rotation • Additionally, planets move with respect to the fixed stars, that’s why they are called planets (greek: wanderers) • Due to the planet’s movement in their orbit, and Earth’s orbital motion, this additional motion – the apparent motion of the planet as seen from Earth - looks com ...
a. What do we mean by a light year?
a. What do we mean by a light year?

... 4. a. Describe the coordinate system we use to identify points on Earth. On earth we use latitude and longitude. Latitude measures the angular distance we are north or south of the equator as measured from the center of the Earth. Lines of latitude are parallel to one another and form circles whose ...
celestial sphere.
celestial sphere.

... the celestial poles (1 day cycle) Observation: Stars, Sun, Moon and planets move in counterclockwise circles around ...
The Stars and the Solar System
The Stars and the Solar System

... far outside the solar system. Even as the Earth moves through its orbit around the Sun, each star remains nearly the same distance away. ...
The Stars and the Solar System
The Stars and the Solar System

... far outside the solar system. Even as the Earth moves through its orbit around the Sun, each star remains nearly the same distance away. ...
The Kepler spacecraft has found thousands of likely extrasolar
The Kepler spacecraft has found thousands of likely extrasolar

... ust over 20 years ago, astronomers first detected signs of planets outside our solar system. Initially, they expected to find solar systems like ours, but they quickly realized that isn’t how nature works. In fact, one of the first exoplanets discovered is about Jupiter’s mass but circles its Sun-li ...
By plugging their latest findings into Earth`s climate patterns
By plugging their latest findings into Earth`s climate patterns

... and the star’s rotation do not align, as is typically the case. In other words, the planet’s orbit (and thus our line of sight to it) must be highly inclined to the star’s equatorial plane. It turns out HD 80606b’s violently fluctuating weather is just one intriguing aspect of this transiting exopla ...
Over thousands of years each word in the box has come down from
Over thousands of years each word in the box has come down from

... to yourself. Then write it below. ...
ET: Astronomy 230 Outline Important Caveat
ET: Astronomy 230 Outline Important Caveat

... • About 2/3 of all stars are in multiple systems. – Is this good or bad? • Disks around stars are very common, even most binary systems have them. • Hard to think of a formation scenario without a disk at some point– single or binary system. • Disk formation matches our solar system parameters. • We ...
Lecture 13
Lecture 13

... Stellar spectra in order from the hottest (top) to coolest (bottom). ...
Chapter 14 Origins
Chapter 14 Origins

... The first few decades of the twentieth century brought huge changes to our model of the universe. Construct a small table listing the names of the most important researchers involved (you should be able to include at least five) and a brief summary of their contribution. ...
Apr 2017 - Astronomical Society of Northern New England
Apr 2017 - Astronomical Society of Northern New England

... and completely transformed our view of the universe. It was a bigger leap in knowledge than we had when Galileo first looked up with his little telescope and discovered things we had never dreamed of, but are now completely taken for granted as obvious science. April 28. The moon passes near Mars th ...
Some space objects are visible to the human eye.
Some space objects are visible to the human eye.

... above you, and still others set at the western horizon. Throughout the ages, many peoples have observed these changes and used them to help in navigation and measuring time. If you extended the North Pole into space, it would point almost exactly to a star called Polaris, or the North Star. If you w ...
Wadhurst Astronomical Society Newsletter May 2017
Wadhurst Astronomical Society Newsletter May 2017

... how the angle at which we see the jet is causing an optical illusion and in fact the jet is travelling just less than the speed of light. He also said that we see objects that have travelled billions of light years but in that time, the Universe has expanded even more and they will be even further a ...
AST 111 Lecture 7
AST 111 Lecture 7

... • Imagine you’re where Earth is – but there’s no Earth. – You’re rotating in place. You see the Celestial Sphere rotating. – How many degrees do you need to rotate through to get back to the same view? • Yes, this is as simple as you think it is! ...
8-3-Star_Classification STUDENT
8-3-Star_Classification STUDENT

... People use them to find their way around the sky like someone using objects to get from place to place. ...
Phobos
Phobos

... and any associated planets. However, without identification and characterization of the foreground star, little can be said about the accompanying planet. The newly discovered host star, catalogued as OGLE-2003-BLG-235L/ MOA-2003-BLG53L, has a planetary companion that was discovered in 2003 through ...
File
File

... **You do not need to know this slide but interesting information ** ...
(AU): Average distance from Earth to Sun
(AU): Average distance from Earth to Sun

... • Celestial body in orbit around the Sun. • 8 in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune • Distance from the sun determines characteristics (ESRT) • Density generally decreases with distance from the sun ...
Worksheet Task 2 - www .alexandria .k12 .mn .us
Worksheet Task 2 - www .alexandria .k12 .mn .us

... in 2009. So far it has discovered five new Earth-sized planets beyond our solar system. These planets are hotter than the Earth’s sun – much too hot for life as we know it. The Kepler team predict that they will need at least three years (and possibly longer) to find an Earth-like planet. The simple ...
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History of astronomy



Astronomy is the oldest of the natural sciences, dating back to antiquity, with its origins in the religious, mythological, cosmological, calendrical, and astrological beliefs and practices of pre-history: vestiges of these are still found in astrology, a discipline long interwoven with public and governmental astronomy, and not completely disentangled from it until a few centuries ago in the Western World (see astrology and astronomy). In some cultures, astronomical data was used for astrological prognostication.Ancient astronomers were able to differentiate between stars and planets, as stars remain relatively fixed over the centuries while planets will move an appreciable amount during a comparatively short time.
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