Module 15

NCVPS Earth and

Environmental Science

Planetary Motion

The definition of the universe is all

matter and energy.

imagine.gsfc.nasa.gov1306 × 822Search by image

Image credit: NASA/Swift Science Team/Stefan Immler

The galaxies are made up of groups of hundreds of

billions of stars. There are hundreds of billions of galaxies.

www.jpl.nasa.gov2228 × 3462Search by image

Space Images Search: galaxy evolution explorer (galex),spitzer space telescope - NASA Jet Propulsion Laboratory

A light year is the

time it takes light to

travel in one year at

186,000 miles per

second.

maggieameanderings.com270 ×180Search by image

light year illustration. Light-year depiction. From StarChild site at NASA/ GSFC which should make this image Public Domain

The speed of light is 186,000 miles per second.

(Droit d'auteur : les textes sont disponibles sous licence Creative Commons paternité partage à l’identique ; d’autres conditions peuvent s’appliquer. Voyez les conditions d’utilisation pour plus de détails, ainsi que les crédits graphiques. En cas de réutilisation des textes de cette page, voyez comment citer les auteurs et mentionner la licence.Wikipedia® est une marque déposée de la Wikimedia Foundation, Inc., organisation de bienfaisance régie par le paragraphe 501(c)(3) du code fiscal des États-Unis.)

Hydrogen and helium are the two main components of stars.

www.infoescola.com4096 × 4096Search by image

Foto: NASA / Solar Dynamics Observatory

There are hundreds

of billions of stars in a

galaxy.

Kepler Mission Manager Update –503 New Planet Candidateskepler.nasa.gov1600 × 1206Search by image

Kepler is studying over 150,000 stars in our neighborhood of our galaxy in the Cygnus and Lyra constellations.

Stars create their energy

through the process of nuclear

fusion. Fusion is the process in which light atoms combine to

form heavier atoms, giving off

excess energy in the process.

scienceblogs.com447 × 430Search by image

Image credit: NASA.

One star and all of the objects that

orbit it make up a solar system.

GSI Web - Planet Earth

www.gsi.ie450 × 244Search by image

The Solar System photo modified from http://photojournal.jpl.nasa.gov/

Our Earth is part of the galaxy we

know as the Milky Way.

www.unc.edu277 × 239Search by imageProfessor, Department of Environmental Sciences and Engineering Director, Environmental

Microbiology Laboratory

A 'planet' is defined as a round celestial body that is in orbit

around the sun.

www.nasa.gov3300 × 2476Search by image

Image credit: NASA/Tim Pyle Click image for full-resolution. Kepler-11 is a sun-like star around which six planets orbit

Planets became round because of

the force of gravity.

www.nasa.gov800 × 640Search by image

montage of planets Image right: Montage of planets. Image credit: NASA/JPL + Browse version of image

Planets orbiting the sun, moons orbiting planets, comets

orbiting the sun are all examples of satellites.

spaceplace.nasa.gov900 × 469Search by image

Drawing of solar system, showing all planets, the asteroid belt, and the Kuiper. Ceres orbits in the Asteroid Belt between Mars and Jupiter.

Planets and comets orbiting the sun

chandra.harvard.edu510 × 317Search by image

Schematic showing comet LINEAR orbit

moons orbiting planets

nasa-satellites.blogspot.com1500 × 1317Search by image

Astronomers using the Hubble Space Telescope discovered a fourth moon orbiting the icy dwarf planet Pluto

Comets orbiting the sun

www.nasa.gov2400 × 1800Search by imageIllustration of Comet Harley 2 path through the inner solar system with photo of the

comet.

Man-made satellites

Space Based Wireless Communication | Science Of Smart Citiessosc.poly.edu560 × 420Search by imagehttp://climate.nasa.gov/images/normPage-10.jpg. Designing a Satellite. A satellite in space generally has a dish to receive transmitted data

nasa-spacestation-info.blogspot.com708 × 256Search by image

NASA's Stardust-NExT spacecraft is nearing a celestial date with comet Tempel 1 at approximately 8:37 p.m. PST (11:37 p.m. EST), on Feb. 14

Because Copernicus discovered that planets orbit the sun, he

developed the Heliocentric Model.

Helio=sun, Centric= center

earthobservatory.nasa.gov678 × 483Search by

image

Copernicus' heliocentric view of the

universe.

Nicolaus Copernicus

starchild.gsfc.nasa.gov225 × 258Search by image

Tyco Brahe was Johannes Kepler’s

teacher and his boss.

history.nasa.gov238 × 344 www.usu.edu230 × 185Search by image

Kepler’s 1st Law

http://imagine.gsfc.nasa.gov/docs/features/movies/kepler.ht

ml

Angular Parameters of Elliptical OrbitCC BY-SA 3.0

Orbits are elliptical.

Kepler’s 2nd Law

The line connecting the Sun to a planet sweeps equal areas in equal time.

http://imagine.gsfc.nasa.gov/docs/features/movies/kepler.html

Animations for Physics and Astronomy

Catalog for: Astronomy Animations

These animations are available for use under a Creative Commons License.

Kepler’s 3rd Law

Kepler's third law, the law of periods, relates the time required for a planet to make one complete trip around the Sun to its mean distance from the Sun. "For any planet, the square of its period of revolution is directly proportional to the cube of its mean distance from the Sun." Applied to Earth satellites, Kepler'sthird law explains that the farther a satellite is from the Earth, the longer it will take to complete an orbit, the greater the distance it will travel to complete an orbit, and the slower its average speed will be

http://imagine.gsfc.nasa.gov/docs/features/movies/kepler.html

The main point of

Kepler’s third law is to

measure distances

between planets

Earth’s gravity pulls

on the moon and

keeps it in orbit

around the Earth.

science1.nasa.gov1144 × 1236Search by image

The Moon's orbit crosses Earth's magnetotail.

Gravity

What is the difference between

rotation and revolution?

Rotation = earth’s spin

Revolution = Orbit around

the sun

Geography: Earth in Space & Place

clasfaculty.ucdenver.edu1601 × 1198Search by image

Summary: Earth = the “Goldilocks” planet (it's “just right” for life).

www.ncdc.noaa.gov431 × 356Search by image

Diagram of Earth's rotation around the sun and how it causes

seasonal. Credit: NASA. Today, June 21, 2013, is officially the first day

of summer

Phases of the moon

Because it takes the Earth 365.25 days to orbit the sun, we end up with one

extra day every 4 years. So the year with the extra day is called

leap year.

APOD: 2000 February 29 - Julius Caesar and Leap Days

apod.nasa.gov417 × 415Search by image

The sun warms the earth differently according to Tilt of the Earth.

This change in the tilt of the earth is what causes the seasons.

The precession causes the vernal

equinox point g to migrate

clockwise along the Earth's orbit,

shifting the Earth�s seasons

relative to the orbit's eccentric

shape; this motion constitutes the

"precession of the equinoxes." The

angle v between g and P is the

moving longitude of perihelion

and is used in the precession index

esinv to track Earth-Sun distance.

http://www1.ncdc.noaa.gov/pub

/data/paleo/softlib/analyseries/

Precession is the change in direction of the axis, but without

any change in the tilt. This changes the relative positions of the

stars but does not affect the seasons.

frontierscientists.com525 × 176Search by image

A representation of the solar system. / Courtesy NASA

Nutation is a wobbling around the precessional axis. Does is affect the seasons?

U.S. Naval Observatory » Media Gallery

www.meted.ucar.edu300 × 400Search by image

Schematic diagram showing precession and nutation description:

Barycenter is the point between two objects where they balance each other.

doppspec-above.en.gif

spaceplace.nasa.gov300 × 243Search by image

As seen from above, a large planet orbits a star–or rather the star and planet orbit their shared center of mass, or barycenter.

The gravity of the moon pulls on the

ocean’s water. This causes tides.

Scijinks :: Tidal weirdness

scijinks.nasa.gov500 × 284Search by image

Drawing shows Moon's gravity pulling about 45 degrees from pull of sun's gravity. Their combined pull is greatest at a point between, thus creating the highest tide there, rather than when the Moon is directly overhead.

Both the pull of gravity from the sun

and the moon cause tides.

web.ics.purdue.edu586 × 264Search by image

The Moon in turn induces tides on Earth - both ocean and solid Earth tides. These tides vary on a 12-hour interval basis.

There is a bulge at the equator of the Earth because the circumference around

the equator is slightly bigger than the circumference around the poles.

This is a "full-disk" image of the Earth taken from the GOES-11 satellite at 8 a.m. EDT on Aug. 12.

Credit: NASA/GOES Project

Earth’s bulge at the middle

earth.usc.edu1006 × 732Search by image

Pictorial Study Guide for Module 15

Orbital Motions

By Kella Randolph

NCVPS

Earth and Environmental Science