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How Much is a Billion?

Photos: Milky Way Galaxy Milky Way as seen from Earth: courtesy of Photo Researchers; Q&A with Astronomer Julianne Dalcanton:Julianne Dalcanton: courtesy of Julianne Dalcanton; Spiral galaxy: courtesy of AURA/NOAO/NSF; Elliptical galaxy: courtesy of STScI; Irregular Galaxy: courtesy of Bill Shoening/AURA/NOAO/NSF; Sombrero Galaxy: courtesy of Bill Keel; Illustrations: How Much is a Billion: Jim Steck Q&A with Astronomer Julianne Dalcanton Amanda Duffy

How much space do you need to fit a billion oranges?

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How to Write a Billion

Photos: Milky Way Galaxy: Milky Way as seen from Earth: courtesy of Photo Researchers; Julianne Dalcanton: courtesy of Julianne Dalcanton; Spiral galaxy: courtesy of AURA/NOAO/NSF; Elliptical galaxy: courtesy of STScI; Irregular Galaxy: courtesy of Bill Shoening/AURA/NOAO/NSF; Sombrero Galaxy: courtesy of Bill Keel; Illustrations: How Much is a Billion: Jim Steck; Q&A with Astronomer Julianne Dalcanton; Amanda Duffy

Learn scientific notation and get rid of all those zeroes.

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Make Your Own Astronomy Stationery

Illustrations: Jim Steck, Jim Paillot, Daryl Collins

Send a note to a friend with these astronomical letterheads.

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Meet the OLogist: Neil de Grasse Tyson

Photos: Neil de Grass Tyson Pages: Neil de Grasse Tyson: courtesy of Neil de Grasse Tyson; Astronaut on the moon: courtesy of John W. Young, Apollo 16 Crew, and NASA; Light divided by a prism: courtesy of Concept Images, 1998 Noriko all rights reserved; Hubble Telescope View from Deep Space: courtesy of R. Williams and the HDF Team (STScI) and NASA, Hubble Deep Field; Spectrum of light: courtesy of AURA/NOAO/NSF "Copyright Association of Universities for Research in Astronomy Inc. (AURA); all rights reserved." Infrared Hudson river view: courtesy of NASA; Radio telescopes: courtesy of Dave Finley, AUI, NRAO, NSF; The Moon: courtesy of NASA, Galileo; Saturn's Rings: courtesy of JPL, California Institute of Technology and NASA, Voyager 2; Milky Way as seen from the Earth: courtesy of Jayanne English (STScI) et. Al., CGPS, RAL/U. Calgary, APOD; Surface of Io: courtesy of University of Arizona, JPL/SSI and NASA, Galileo; Stars: courtesy of STScI, The Hubble Heritage Team and NASA; Planets: courtesy of NASA; Projector and Hayden Planetarium: courtesy of AMNH Department of Library Services; Kids: All people pictures: courtesy of subjects; Jupiter: courtesy of PDS/JPL and NASA, Voyager 1; Illustrations: All drawings: courtesy of subjects

Discover where starry-eyed Neil has followed his curiosity.

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Moon Flip Book

Photos: Moon Watch Flip Book-Moon: courtesy of NASA; Illustrations: Quinten Steenhuis

See the moon in action! And discover why our view of it changes nightly.

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More or Less Than a Billion

Photos: Milky Way Galaxy: Milky Way as seen from Earth: courtesy of Photo Researchers; Julianne Dalcanton: courtesy of Julianne Dalcanton; Spiral galaxy: courtesy of AURA/NOAO/NSF; Elliptical galaxy: courtesy of STScI; Irregular Galaxy: courtesy of Bill Shoening/AURA/NOAO/NSF; Sombrero Galaxy: courtesy of Bill Keel; Illustrations: How Much is a Billion: Jim Steck; Q&A with Astronomer Julianne Dalcanton: Amanda Duffy

What's a billion? Test your powers of estimation.

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One-on-One with the Sun

Photos: Venus: courtesy of Bill Shoening, AURA/NOAO/NSF; Galaxy in montage: courtesy of STScI; Planets in montage: courtesy of NASA, Voyager 2; Kids: courtesy of Denis Finnin, AMNH; Illustrations: Stella Stardust: Jim Steck; Milky Way Galaxy: Denis Davidson

Find out what makes the Sun glow, and other amazing facts, in an up-close and personal interview with the Sun.

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Q&A with Astronomer Julianne Dalcanton

Photos: Milky Way Galaxy Milky Way as seen from Earth: courtesy of Photo Researchers; Q&A with Astronomer Julianne Dalcanton:Julianne Dalcanton: courtesy of Julianne Dalcanton; Spiral galaxy: courtesy of AURA/NOAO/NSF; Elliptical galaxy: courtesy of STScI; Irregular Galaxy: courtesy of Bill Shoening/AURA/NOAO/NSF; Sombrero Galaxy: courtesy of Bill Keel; Illustrations: How Much is a Billion: Jim Steck Q&A with Astronomer Julianne Dalcanton Amanda Duffy

Find out what's fun about being astronomer and what's unique about our Milky Way Galaxy.

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Solar System Scavenger Hunt

Illustrations: Eric Hamilton

Size up the planets with a model scavenger hunt.

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Space Travel Guide

Illustrations: Eric Hamilton

Let your imagination run wild, and write an inspiring work of science fiction.

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Phone: 212-769-5100

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