Ask John Harper
Astronomy Q & A
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General
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Moon
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Solar System
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Stars
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Constellations
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Galaxies
General
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the function of the eardrum in the middle ear is to
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Why does day legth change on different days of the year?
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Earths greatest speed of rotation occurs at the: a. equator b. tropid of cancer c. artic circle
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including sea level, how many contour lines would be needed to show an island 125 feet high on a map with a contour interval of 20 feet?
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whens the next eclips for Canada?
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how were craters discovered?
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I bekieve that in the early yrs of space exploration...when we sent up satalites, that 1 of the "Voyager" satilites went off into deep space after completeing its mission. Do any of our new satilites pick up any signals from it?
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how hot is the sun and lava
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the angle of the sun's rays causes the what?
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Witch 2 gases make up the atmosphere?
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General
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Moon
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Solar System
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Stars
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Constellations
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Galaxies
Moon
The moon's gravity is 6 times _______than that on earth's surface
If the moon is eventually moving away from the Earth, would it be a bad idea to have people move there?
what is the moons tempature?
what is the difference between a solar eclipse and i lunar eclipse
what's the moons temperature?
When is the next soler eclipse that can be seen from new york state
You said the Moon orbits the Earth. So the Sun being farther away would tend to have a slower orbit or travel time aqround the Earth. Is that why we can see the Moon during the day?
Sometimes the Moon is visible during the day. Does the Moon orbit faster than the Sun? Why can we see the Moon during the day?
what is the name of the full moon that occurs nearest the autumnal equinox
approximate value for the rate at which the moon orbits the earth?
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General
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Moon
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Solar System
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Stars
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Constellations
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Galaxies
Solar System
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what is mercurys core mostly made up of
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what is the length time for revolution (length of year) for saturn??
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what is mercury's well known feature
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what is mercurys core mostly made up of?
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Why the earth takes 24 hours to revolve the sun but Jupiter only take 10 hours?
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how long would it take to get from earth to mercury on a space ship?
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how long would it take to travel around saturn
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how many years does it take halleys comet to make one orbit around earth
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who discoverd saturn's rings
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who invented the first telescope and discovered the four moons of jupiter?
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General
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Moon
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Solar System
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Stars
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Constellations
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Galaxies
Stars
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HEY!!! can u tell me how many miles markab is from the sun, i no its 140 light years but i need light years! THANKS!!!! HAPPY HOLIDAYS!!! plzz answer soon
how far is Sirrah the star from earth
Can you tell me what is the brightest star on the planet.
HI! Can you tell me the temperature, brightness, distance in light years and color of the stars Markab, Scheat, Algenib, Enif, Homam, Matar and Alpheratz?
what is the absolute brightness of the stars in the constellation pegasus?
What are the distances of the stars in pegasus from the planet earth?
What are the temperatures of the stars in the constellation Pegasus
What are the colors of the stars in the constellation Pegasus?
What is the surface temperature of Mesarthim and Botein?
what is the temperature of the star matar?
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General
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Moon
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Solar System
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Stars
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Constellations
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Galaxies
Constellations
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how did the constellation of scorpio get its name?
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who discovered the constellation libra?
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who was carcer dicover by .like the astonomer
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how does the orion constellation help predict seasons
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can orion and scorpious be in the same place at the same time?
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How did Andromeda get its name?
how did hydras constellation get its name
How did Orion get its name?
where did scorpius get it name from
How did the big dipper get its name
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General
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Moon
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Solar System
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Stars
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Constellations
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Galaxies
Galaxies
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if i travell at the speed of light how long would it take me to get to the nearesr galaxy?
what is the name of the galaxy in which earth is located? what kind of a galaxy is it?
what is the difference between a solar system and a galaxy
Hi. I was wondering if the furtherest planets & galaxies are trillions or more lightyears away are they still there or just reminants of what was?
how long those it takes for the sun to revolve around the milkyway.
What is the name of the galaxy in which Earth is located? What kind of a galaxy is it? Describe Earths location within the galaxy
what is the name of the galaxy in which Earth is located? What kind of galaxy is it? Describe Earths location within the galaxy
how long (in years) would it take to travel across at galxy traveling at the speed of light?
how long would it take to travel across the milky way at the speed of light
If the Universe is expanding and everything is moving away from our Galaxy the Milky Way, how is that the Galaxy Andromeda is on a collision course with the Milky Way?
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