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	Search Results for Astronomical Distances Search Type: Keywords | Results: Radio Programs | Images | FAQs | Other Resources | Search Again Definition Light-year: A unit of length used by astronomers to measure distance. One light-year is equal to the distance light travels in one year, which is about 5.88 trillion miles or almost 800 times the diameter of our solar system. More » Parsec: A unit of distance equal to 3.26 light-years. The name means "PARallax-SECond," and it refers to a way to measure the distances to other stars. More » Stargazing Tip No stargazing tips found. Check the Sky Almanac for more information. Radio Programs Displaying 1 to 5 (of 97 total) results | More results »  Title  Air Date Andromeda Galaxy October 16, 2009 Eta Aquilae September 10, 2009 Deneb August 25, 2009 Hipparcos August 8, 2009 Shooting the Moon July 17, 2009 Note: Audio versions of our programs will be available the day after they air. Visit the transcript page to listen. Image Gallery Displaying 1 to 5 (of 26 total) results | More results »  Image Neighbors Pushing Away the Pleiades Dark Crossing First Glimpse A Showy Neighbor Frequently Asked Questions Displaying 1 to 5 (of 10 total) results | More results »  Question Are we trying to contact extraterrestrial civilizations? Will we ever visit other stars? How do astronomers measure distances to stars and galaxies? What is the Sun's place in the Milky Way? How big is the solar system? Other Resources StarDate Online | News | Hipparcos Data Could Change Universe's Size http://stardate.org/resources/news/universe/199706.html StarDate Online | News | Astronomers Push Back Most Prolific Star-Forming Era — Maybe http://stardate.org/resources/news/universe/200204.html StarDate Online | News | Constant Controversy Bedevils Hubble’s Magic Number http://stardate.org/resources/news/universe/200612.html StarDate Online | More about StarDate in the Classroom http://stardate.org/teachers/moreclassroom.html StarDate Online | News | Universe Will Expand Forever, Astronomers Say http://stardate.org/resources/news/universe/199804.html StarDate Online | News | Time Marches On...But How? http://stardate.org/resources/news/universe/200306b.html StarDate Online | News | Structure of Universe Supports Accelerating Expansion http://stardate.org/resources/news/universe/200206.html StarDate Online | Teacher Guide http://stardate.org/teachers/links.html StarDate Online | Solar System Guide | Jupiter http://stardate.org/resources/ssguide/jupiter.html StarDate Online | Solar System Guide | Saturn http://stardate.org/resources/ssguide/saturn.html StarDate Online | Solar System Guide | Uranus http://stardate.org/resources/ssguide/uranus.html StarDate Online | Solar System Guide | Earth and Moon http://stardate.org/resources/ssguide/earth_and_moon.html StarDate Online | Solar System Guide | Mercury http://stardate.org/resources/ssguide/mercury.html StarDate Online | Solar System Guide | Neptune http://stardate.org/resources/ssguide/neptune.html StarDate Online | Solar System Guide | Mars http://stardate.org/resources/ssguide/mars.html StarDate Online | Solar System Guide | Venus http://stardate.org/resources/ssguide/venus.html StarDate Online | Classroom Activities http://stardate.org/teachers/activities/ StarDate Online | Solar System Guide | Comets http://stardate.org/resources/ssguide/comets.html StarDate Online | Solar System Guide | Sun http://stardate.org/resources/ssguide/sun.html StarDate Online | News | A Long Night Ahead for the Universe http://stardate.org/resources/news/universe/199704.html
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