Advertisement.

EnchantedLearning.com is a user-supported site.
As a bonus, site members have access to a banner-ad-free version of the site, with print-friendly pages.
Click here to learn more.

ad
(Already a member? Click here.)


You might also like:
Lenticular GalaxiesThe Nearest StarsActive GalaxiesNebulaeElliptical GalaxiesToday's featured page: Stegosaurus - Dinosaur


Table of Contents Enchanted Learning
All About Astronomy
Site Index
Our Solar System Stars Glossary Printables, Worksheets, and Activities
The Sun The Planets The Moon Asteroids Kuiper Belt Comets Meteors Astronomers

The Stars
Lifecycle Nuclear Fusion Brightest Stars Galaxies Other Solar Systems Constellations Why Stars Twinkle
Birth Death Star Types Closest Stars Nebulae Major Stars The Zodiac Activities, Links

Other Solar Systems

Star WobbleRecently, many other stars with orbiting planets have been discovered. These planets (called exoplanets) have not yet been directly seen by us, but they have been detected by the very slight "wobble" they induce in their star.

Stars with orbiting planets "wobble" slightly as their planets gravitationally tug at them. By measuring the amount of "wobble" over time, astronomers can calculate how massive a planet (or planets) would have to be make that star "wobble" that much.

Using this method, large planets are more easily detected than smaller ones. Also, planets in closer (faster) orbits are more easily found. Thousands of exoplanets have been found so far, including gas giants (mostly hydrogen and helium, like Jupiter), water-dominated planets, and rocky ones (like Earth and Mars).

UPSILON ANDROMEDAE: A Star with Recently-Discovered Orbiting Planets
Planet Distance from U.A.
(Astronomical Units)
Orbital period
Planetary Year
Mass of the Planet
#1 0.06 AU 4.6 Earth days 3/4 the mass of Jupiter
#2 0.83 AU 242 Earth days 2 times the mass of Jupiter
#3 2.5 AU 3.5-4 Earth years 4 times the mass of Jupiter
Upsilon Andromedae is a star in the constellation Andromeda. Astronomers Geoffrey W. Marcy and R. Paul Butler discovered a massive planet orbiting this star (with each orbit taking only 4.6 days.) in 1996. Recently, 2 even more massive planets have been discovered orbiting this star. The three planets orbit within 2.5 Astronomical Units of the star.

Web Links about other Solar Systems
Geoffrey W. Marcy's Page at San Francisco State University, USA.
Exoplanet Data Explorer an interactive table and plotter for exploring and displaying data from the Exoplanet Orbit Data.
Encyclopedia Extrasolar lists other extrasolar planetary candidates.




Enchanted Learning®
Over 35,000 Web Pages
Sample Pages for Prospective Subscribers, or click below

Overview of Site
What's New
Enchanted Learning Home
Monthly Activity Calendar
Books to Print
Site Index

K-3
Crafts
K-3 Themes
Little Explorers
Picture dictionary
PreK/K Activities
Rebus Rhymes
Stories
Writing
Cloze Activities
Essay Topics
Newspaper
Writing Activities
Parts of Speech

Fiction
The Test of Time
iPhone app
TapQuiz Maps - free iPhone Geography Game

Biology
Animal Printouts
Biology Label Printouts
Biomes
Birds
Butterflies
Dinosaurs
Food Chain
Human Anatomy
Mammals
Plants
Rainforests
Sharks
Whales
Physical Sciences: K-12
Astronomy
The Earth
Geology
Hurricanes
Landforms
Oceans
Tsunami
Volcano
Languages
Dutch
French
German
Italian
Japanese (Romaji)
Portuguese
Spanish
Swedish
Geography/History
Explorers
Flags
Geography
Inventors
US History

Other Topics
Art and Artists
Calendars
College Finder
Crafts
Graphic Organizers
Label Me! Printouts
Math
Music
Word Wheels

Click to read our Privacy Policy

E-mail


Enchanted Learning Search

Search the Enchanted Learning website for:



Advertisement.



Advertisement.



Advertisement.



Copyright ©1999-2016 EnchantedLearning.com ------ How to cite a web page