mages of Scientists and Philosophers
Alphabetical by Name
"Portrait of Archimedes," courtesy of Corbis-Bettmann. From photograph of sculpture in the National Museum, Naples.
"Portrait of Aristotle," courtesy of Corbis-Bettmann.
"Portrait of Tycho Brahe," courtesy of The Institute and Museum of the History of Science in Florence, Italy.
"Picture of Giovanni Cassini," courtesy of Corbis-Bettmann
"Portrait of Nicolas Copernicus," courtesy of SPL/Photo Researchers.
"Picture of Marie Curie," Courtesy of The Bettmann Archive
"Picture of Leonardo DaVinci," courtesy of The Bettmann Archive.
"Picture of Democritus," courtesy of The Bettmann Archive.
"Picture of Thomas Edison," Courtesy of The Bettmann Archive
"Picture of Albert Einstein," Courtesy of Tracey Keifer. Emilio Segre Visual Archives. American Institute of Physics.
"Portrait of Galileo," Ottavio Leoni, courtesy of Reunion des Musees Nationaux.
"Portrait of Edmond Halley," courtesy of the Royal Society Library, London.
"Portrait of William Herschel," courtesy of NASA/JPL, California Institute of Technology.
"Picture of Hipparchus," courtesy of Corbis-Bettmann
"Portrait of Christian Huygens," courtesy of SPL/Photo Researchers
"Portrait of Johan Kepler," courtesy of The Bettman Archive. From engraving by MacKenzie.
"Picture of Isaac Newton," courtesy of Corbis-Bettmann
"Picture of Louis Pasteur," courtesy of The Bettmann Archive. From painting by Edelfeld.
"Picture of Plato," courtesy of Corbis-Bettmann. From sculpture in the Vatican, Rome.
"Picture of Ptolemy," courtesy of The Bettmann Archive
"Picture of Pythagoras," courtesy of The Bettmann Archive
"Picture of Ernest Rutherford," Courtesy of The Bettmann Archive. From painting by James Gunn (1932).
"Picture of Socrates," courtesy of The Bettmann Archive
Fun with the Sun
This page contains answers to questions that have to do with the Sun. They explore solar facts, solar activity and much more! Click on a topic to see our "Quickie" questions archive or scroll down for more in-depth answers.Quickie Fun with the Sun
Movement of the Sun | (38 questions) |
Interior/Surface | (15 questions) |
Effects of the Sun | (55 questions) |
Other | (154 questions) |
In-depth questions and answers
1)What is the diameter of the Sun?2)How can I look at a solar eclipse?
3)When is the next solar storm expected? What effects could you expect? How far away from the Sun does a solar flare shoot?
4)How hot is the Sun? How long does it take the suns rays to reach Earth?
5)How old is the Sun? What will happen when the Sun turns into a nebula?
6)Is there any uppermost temperature? Is it possible to measure the temperature in the core of a star?
7)What are the main differences between the sun and other stars?
8)How far is the Earth from the Sun, the Moon and all the other planets? How far are all of the planets from the Sun? Do you know of a software that tracks the planets in real-time?
Moon Madness
This page contains answers to questions that have to do with the moon. They explore lunar missions, facts and trivia about the Moon and much more! Click on a topic to see our "Quickie" questions archive or scroll down for more in-depth answers.Quickie Moon Madness
Movement of the Moon | (23 questions) |
Interior/Surface | (13 questions) |
Phases/Viewing | (23 questions) |
Other | (113 questions) |
In-depth questions and answers
1)"That's one small step for man, one giant leap for mankind."...planned or spontaneous?2)Why haven't there been more lunar landings in recent years?
3)Is the Moon hot or cold?
4)Why can't you see the far side of the Moon?
5)What is the period of the Moon? the Earth? How long does it take Mars to rotate on its axis?
6)How does the phenomena of "seasons" occur. Why would it be summer in Maryland when it is winter in the southern hemisphere? Does the Moon have seasons?
7)Why does the Moon have an orange color in the Fall?
8)Why is the Moon moving away from the Earth? Will it just keep on going?
9)Is the Moon round? Diameter, weight, distance, age of the Moon? Internal structure? Is anyone buried on the Moon? and more!
10)What are maria? What are highlands? Phase of the Moon on certain date? Traveling from one phase to another? Moon tilt? If Moon spun twice? and more!
11)Were the Moon landings faked? What about the flag "waving in the breeze"? Who took the astronauts' picture if noone else was on the Moon at the time?
Extraordinary Earth
This page contains answers to questions that have to do with the Earth. They explore geology, the environment, our weather and much more! Click on a topic to see our "Quickie" questions archive or scroll down for more in-depth answers.Quickie Extraordinary Earth
Movement of the Earth | (74 questions) |
Gravity/Magnetism | (15 questions) |
Interior/Surface | (46 questions) |
Atmosphere/Weather | (41 questions) |
Oceans/Water | (11 questions) |
Sun/Moon Effects | (23 questions) |
Other | (418 questions) |
In-depth questions and answers
1)Why is the sky blue?2)What is the velocity of the Earth?
3)How many man-made satellites are currently orbiting the Earth?
4)If natural resouces (natural gas, oil, and coal) are formed by extreme pressure acting on material made mainly of carbon, why don't we send large amounts of useless carbon based things to Venus where there is very extreme surface pressure?
5)What is the period of the Earth? the Moon? How long does it take for Mars to rotate on its axis?
6)Why is the ocean blue?
7)How does the phenomena of "seasons" occur. Why would it be summer in Maryland when it is winter in the southern hemisphere? Does the Moon have seasons?
8)Are there any places that you can become weightless other than space?
9)If the Earth is round like a ball, why aren't we standing at odd angles around it?
10)What is the white we see coming off an airplane in the sky?
11)What is the climate like in the desert? What kinds of life can you find there? How do they handle the conditions in the desert?
12)Does wind have an effect on radio waves?
13)What are isotherms and isobars?
14)Is a meteor going to crash into Earth in 2028? What can we do?!?
15)Why is the Moon moving away from the Earth? Will it just keep on going?
16)How are temperature and humidity related?
17)What is gravity and how does it work?
18) Why does the temperature in our atmosphere vary?
19)Earth's perihelion, aphelion, circumference, rotational and orbital speed...and more?
20)How far is the Earth from the Sun, the Moon and all the other planets? How far are all of the planets from the Sun? Do you know of a software that tracks the planets in real-time?
21)Were the Moon landings faked? What about the flag "waving in the breeze"? Who took the astronauts' picture if noone else was on the Moon at the time?
Other Solar System Stuff
This page contains answers to questions that have to do with the solar system (excluding the Sun, Earth, and Moon). They explore man-made satellites, the planets and their moons, comets, asteroids and much more! Click on a topic to see our "Quickie" questions archive or scroll down for more in-depth answers.Quickie Other Solar System Stuff
Mercury | (72 questions) |
Venus | (96 questions) |
Mars and Its Moons | (125 questions) |
Jupiter and Its Moons | (116 questions) |
Saturn and Its Moons | (87 questions) |
Uranus and Its Moons | (87 questions) |
Neptune and Its Moons | (69 questions) |
Pluto and Its Moon | (86 questions) |
Asteroids/Meteors/Meteroids/Comets | (29 questions) |
Other | (386 questions) |
In-depth questions and answers
1)Why is Jupiter called a gas planet?2)Do you think that in another century the human race will be able to travel to Pluto?
3)Does Mars have a core like Earth?
4)Who will be the first person on Mars?
5)How many man-made satellites are currently orbiting the Earth?
6)If natural resources (natural gas, oil, and coal) are formed by extreme pressure acting on material made mainly of carbon, why don't we send large amounts of useless carbon based things to Venus where there is very extreme surface pressure?
7)Do planets in the solar system crash?
8)What would life be like if humans lived on Mars?
9)When a satellite is held in orbit, what is it orbiting relative to? What's so special about the orbit of geosynchronous satellites?
10)How long does it take for Mars to rotate on its axis? What is the period of the Earth? the Moon?
11)What can you tell me about Planet X, the unknown planet?
12)What lifeform could live on Jupiter or Mars?
13)Is a meteor going to crash into Earth in 2028? What can we do?!?
14)What is the gravity assist, swingby approach used with spacecraft?
15)Who discovered all the planets?
16)Why haven't we sent a manned mission to Mars?
17)What are the most commonly used symbols for the planets, the Sun, and the Moon?
18)Is Pluto really a planet?
19)What are the retrograde motions of planets in the sky?
20)How many planets orbit the sun? I was wondering if there is a new planet? Are there any objects that orbit the sun that are not in the same plane as the planets, excluding pluto, comets, asteroids? Do we know any names to any other planets than those in our solar system? If yes, could you give me any examples?
21)How far is the Earth from the Sun, the Moon and all the other planets? How far are all of the planets from the Sun? Do you know of a software that tracks the planets in real-time?
Astronomy Anomalies
This page contains answers to questions that have to do with the interesting objects in the universe. They explore stars, black holes, quasars, pulsars and much more! Click on a topic to see our "Quickie" questions archive or scroll down for more in-depth answers.Quickie Astronomy Anomalies
Big Bang | (21 questions) |
Black Holes | (47 questions) |
Stars & Constellations | (66 questions) |
Galaxies | (56 questions) |
Universe | (37 questions) |
Other | (127 questions) |
In-depth questions and answers
1)What is the edge of the universe like? Will we be able to go past it someday?2)Is it possible to travel through time?
3)Is there an object in the universe that can travel faster than the speed of light?
4)How much (in meters) is a black hole's diameter? What would happen if you got sucked into a black hole?
5)What is the biggest star discovered? And how big is that star?
6)How can a neutrino be detected?
7)What do you know about the 'Star of Bethlehem' that was mentioned in the New Testament of the Holy Bible?
8)Is there any uppermost temperature? Is it possible to measure the temperature in the core of a star?
9)If I wanted to become an astronomer, how would I go about doing that?
10)How do astronomers measure the distance to stars? Is it accurate?
11)What are Cepheid variables?
12)How does the ratio of the amounts of hydrogen to helium in a star affect what kind of star it is and what kind of light it gives off?
13)What is dark matter, and what are the problems with it?
14)Did the Big Bang create black holes?
15)What is the farthest thing I can see with my own eyes, and the farthest thing I can see with an amateur telescope, and the farthest-away thing the biggest telescopes on Earth can see?
16)What are the main differences between the sun and other stars?
17) How do people tell how old a star is?
18) How far across is the Milky Way? At a given time how can one locate the center of our galaxy as we orbit the Sun and the Sun orbits the galaxy? Is our solar system moving away from the center of the galaxy? How many years does it take the Sun to orbit the center of the galaxy? Specifically, where in the universe can our solar system be found?
Phascinating Physics
This page contains answers to questions that have to do with physics. They explore time, the speed of light, the universal forces and much more! Click on a topic to see our "Quickie" questions archive or scroll down for more in-depth answers.Quickie Phascinating Physics
Gravity/Light/Magnetism | (42 questions) |
Space-Time/Relativity | (12 questions) |
Particle Physics | (13 questions) |
Chemistry | (30 questions) |
Other | (241 questions) |
In-depth questions and answers
1)Is it possible to travel through time?2)Is there an object in the universe that can travel faster than the speed of light?
3)What are the universal forces?
4)Why are atoms "smashed" in an accelerator? What is learned by that process?
5)How can a neutrino be detected?
6)Can you blow bubbles in space?
7)How do scientists know what an atom looks like, to make a model of one?
8)If 2 cars are traveling at the speed of light and the one in the back turns on its headlights, would the car in front be able to see them?
9)Is it true that positrons run down the time and electrons run up the time?
10)Are there any places that you can become weightless other than space?
11)If the Earth is round like a ball, why aren't we standing at odd angles around it?
12)Why is it said that a person traveling in spaceships at near speed of light comes back younger than his counterpart on earth?
13)What is Schrodinger's cat paradox?
14)What is the gravity assist, swingby approach used with spacecraft?
15)What is twice as cold as zero?
16)What is gravity and how does it work?
17)How do airplanes fly?
Humans and the Things They Do
This page contains answers to questions that have to do with human life. They explore human biology, science professions, science projects and much more! Click on a topic to see our "Quickie" questions archive or scroll down for more in-depth answers.Quickie Humans and the Things They Do
Astronauts/Astronomers | (21 questions) |
Other Scientists | (33 questions) |
Technology | (49 questions) |
Space Missions | (104 questions) |
Other Things They Do | (241 questions) |
In-depth questions and answers
1)"That's one small step for man, one giant leap for mankind."...planned or spontaneous?2)What things can students do as homework science projects?
3)Do you think that in another century the human race will be able to travel to Pluto?
4)What does it take to become an astronaut?
5)Who will be the first person on Mars?
5)Does the millennium actually begin on January 1, 2000, or on January 1, 2001?
6)What would life be like if humans lived on Mars?
7)Do different parts of the body demonstrate different degrees of two-point discrimination?
8)Are there any places that you can become weightless other than space?
9)What do you know about the 'Star of Bethlehem' that was mentioned in the New Testament of the Holy Bible?
10)If I wanted to become an astronomer, how would I go about doing that?
11)Why haven't we sent a manned mission to Mars?
Alive and Living
This page contains answers to questions that have to do with life in the Universe. They explore life on Earth and the prospect of life in places other than Earth! Click on a topic to see our "Quickie" questions archive or scroll down for more in-depth answers.Quickie Alive and Living
Humans | (38 questions) |
Animals | (37 questions) |
Plants | (12 questions) |
Extraterrestrials | (35 questions) |
Other | (83 questions) |
In-depth questions and answers
1)Do you think there might be life on other planets?2)What would life be like if humans lived on Mars?
3)Do different parts of the body demonstrate different degrees of two-point discrimination?
4)What lifeform could live on Jupiter or Mars?
5)What is the climate like in the desert? What kinds of life can you find there? How do they handle the conditions in the desert?
Images & Multimedia
Here you will find links to all sorts of pictures, animations, videos, sounds, and interactive multimedia that are on Windows to the Universe
You need special software or hardware to view some of these items. Does your computer have the software and hardware it needs to access these items? To find out, click here. |
Image Galleries
Animations, Video & Audio
- Earth
- Animation of Annual Variation in Sea Ice Extent in the Northern Hemisphere (527 KB QuickTime movie)
- Animation of Annual Variation in Sea Ice Extent in the Southern Hemisphere (484 KB QuickTime movie)
- Break Water - MP3 audio podcast from NSF
- Buggles - MP3 audio podcast from NSF
- Cafe Latte Batte - MP3 audio podcast from NSF
- Collateral Damage - MP3 audio podcast from NSF
- Deep Voices - MP3 audio podcast from NSF
- Degrees of Survival - MP3 audio podcast from NSF
- Evolution Revolution - MP3 audio podcast from NSF
- Eye Screen - MP3 audio podcast from NSF
- Distant Whaletive - MP3 audio podcast from NSF
- Evolution Hits the Beach - streaming RealVideo (1 min. 7 sec.) from NSF
- Flight Path - MP3 audio podcast from NSF
- Fragrant Violation - MP3 audio podcast from NSF
- Frogantuan - MP3 audio podcast from NSF
- Galapagos Islands flyover animation (MPEG)
- Gasoline Plant - MP3 audio podcast from NSF
- Genetics of Self-Sacrifice - streaming RealVideo (1 min. 19 sec.) from NSF
- Geoclimate: Probing Earth's Deep-Time Climate Archives - streaming RealVideo (23 min. 14 sec.) from NSF
- Going, Going Guam - MP3 audio podcast from NSF
- Got Mica? - MP3 audio podcast from NSF
- The History of Early Polar Exploration - streaming RealVideo (11 min. 48 sec.) from NSF
- Loving Environment - MP3 audio podcast from NSF
- Making Earthquakes... Indoors - streaming RealVideo (1 min. 6 sec.) from NSF
- Multi-Faceted - MP3 audio podcast from NSF
- Nature's Strongest Glue? - streaming RealVideo (51 sec.) from NSF
- Night Moves - MP3 audio podcast from NSF
- Reef Savers - MP3 audio podcast from NSF
- Reusing Forests - streaming RealVideo (53 sec.) from NSF
- Rotating Earth globe - large (1.4 MB) and small (238 KB) QuickTime versions and large (542 KB) AVI version
- Rotating Earth globe with exaggerated topography (MPEG)
- Sugar Rush - MP3 audio podcast from NSF
- Teaching Robots to Swim - streaming RealVideo (1 min. 26 sec.) from NSF
- Tropical Hunch - MP3 audio podcast from NSF
- Tropical Punch - MP3 audio podcast from NSF
- Physics
- Aphelion & Perihelion of an Orbit (Flash)
- Einstein's Messengers - LIGO Documentary - streaming RealVideo (20 min. 12 sec.) from NSF
- Elliptical Orbits (small 15K GIF | large 27K GIF)
- Orbital Eccentricity (small 15K GIF | large 29K GIF)
- Solar System
- Aphelion & Perihelion of an Orbit (Flash)
- Comet Kudo-Fujikawa near Sun on January 29, 2003 (small 820K GIF | large 3.7M GIF | News Story)
- Comet NEAT near Sun in February 2003 (645K GIF animation | News Story)
- Coronal Mass Ejection (CME) emitted by the Sun in January 2002 (small 316K GIF | large 1M GIF)
- Elliptical Orbits (small 15K GIF | large 27K GIF)
- Graph of Sunspot Counts (810K animated GIF)
- Mercury Transit on May 7, 2003 (small 327K GIF | large 2.2M GIF | News Story)
- Orbital Eccentricity (small 15K GIF | large 29K GIF)
- Rotating Mars globe (animated GIF | MPEG movie)
- Rotating Sun with Sunspots (234K QuickTime video)
- Stardust spacecraft returns comet samples to Earth (small 266K GIF | large 613K GIF)
- Stormy Weather on the Sun? - streaming RealVideo (58 sec.) from NSF
- Space Missions
- The Eagle Has Landed (QuickTime video)
- Neil Armstrong's "One small step..." statement on the Moon (audio) (Apollo 11 page)
- New Horizons mission to Pluto - launch video (5.5 MB MPEG)
- New Horizons mission to Pluto - animation illustrating the entire mission (6.4 MB QuickTime movie)
- New Horizons mission to Pluto - animation showing the trajectory (path through the Solar System) of the spacecraft (4.7 MB QuickTime movie)
- President Kennedy's Man on the Moon Speech (audio)
- Stardust spacecraft returns comet samples to Earth (small 266K GIF | large 613K GIF)
- The Universe
- Einstein's Messengers - LIGO Documentary - streaming RealVideo (20 min. 12 sec.) from NSF
- The History of the Universe in 60 Seconds or Less - Dr. Eric Schulman - streaming RealVideo (1 min. 16 sec.) from NSF
- Star Wars: Where Science Meets Imagination - streaming RealVideo (1 min. 46 sec.) from NSF
- Systematic Search - MP3 audio podcast from NSF
Interactive Multimedia
- Astronomy
- Earth
- Carbon Cycle Game (Flash)
- Clouds in Art (Flash)
- Compare Images of Arctic Sea Ice Extent Side-by-side
- Compare Images of Antarctic Sea Ice Extent Side-by-side
- Earth's Magnetic Field (Flash)
- Earth's North Magnetic Pole (Flash)
- Seafloor Spreading and Magnetic Field Reversals (Flash)
- Space Junk
- Physics
- Bar Magnet and Compass (Flash)
- Disk Magnet and Compass (Flash)
- Elliptical orbits (Flash)
- A Matter of Scale (Flash)
- Spherical Analyzer
- Solar System
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Some animations and videos are presented as MPEG files. Go to our Plugins Page to get the software needed to view those if you don't already have it.
Tours
Welcome to our tours section! Click on one of the many tours listed below to be guided through a topic. Remember to choose the level that you prefer before entering a tour by clicking one of the three levels that are at the top of this page. On the top of each page in the tour you will see this:
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Charged Particle Motion in Earth's Magnetosphere
A Peek into the Lives of Stars
Looking at the World in a Different Light
How to Build a star
Volcanoes in the Solar System
Life on Earth
Life in the Solar System
NASA's Exploration for Life
The Surface of the Earth
The Surface of Mars
Comparing the Surfaces of Earth and Mars
The Atmosphere of Mars
Life on Mars??
Mars Exploration
Water on Mars
Mars Climate, Now and In the Past
Picturebook: Mars Pathfinder/Global Surveyor
Carbon Cycle of Mars
The Magnetosphere of Mars
Space Weather
Space Weather is the term scientists use to describe the everchanging conditions in space. Explosions on the Sun create storms of radiation, fluctuating magnetic fields, and swarms of energetic particles. These phenomena travel outward through the Solar System with the solar wind. Upon arrival at Earth, they interact in complex ways with Earth's magnetic field, creating Earth's radiation belts and the Aurora. Some space weather storms can damage satellites, disable electric power grids, and disrupt cell phone communications systems.
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