Answers edited by chandramohanPanakkal
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How do scientists test the pH of soil?
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How bright is a full moon in comparison to the Sun?
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Who discovered the size of earth?
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What enables us to see different stars and constellation during different seasons?
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What is the circumference of the orbit of earth around sun? Is it different for each year?
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At what point does the ecliptic cut the celestial equator?
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What are the approximate size differences between the Earth and the Moon?
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What are all the planets relative size compared to earth's?
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What is the distance from earth to the sun in light years?
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How does looking at the sun damage your eye?
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What causes a nova explosion?
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When a comet is at perihelion does it have a brighter tail?
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Question #5243b
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How long does it take to receive pictures from Mars? When the Phoenix takes pictures on the surface, how long does it take for the pictures to get to us on Earth?
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What is the circumference of the Earth's orbit around the Sun?
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What does the Hubble Space Telescope do?
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How many parsecs are in one mile?
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Is a yellow star, such as the sun, hotter or cooler than an orange star?
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Do astronomers have satellites orbiting other planets in our solar system?
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What is beyond our solar system?
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What are the southern hemisphere constellations?
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What is precession?
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What are some similarities and differences between Venus and Earth?
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How does solar energy convert the heat energy into electrical energy?
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Why are astronomical units used?
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How far are we away from the sun during the winter compared to the summer?
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Does the earth spin slower on the northern and southern latitudes ?
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How can electric energy be produced?
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How does aneroid barometer works?
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Why is the Sun different from other stars in the universe?
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How do refracting telescopes work?
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What is the nearest star to earth?
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How does an electric motor operate?
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What are the sizes of Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto?
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Where did the Apollo Missions land on the moon?
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How does the sun affect our tides?
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Which planet in our solar system is most earth like?
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How do refracting and reflecting telescopes differ?
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How many orbits had the sun completed just after the formation of solar system?
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How long would it take us to travel to Pluto in years?
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Why does the moon exhibit phases?
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Do all stars look like our sun?
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What are sun and stars made of?
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How do spacecrafts like Voyager 1 and 2 transmit pictures of space back to Earth? How do they receive flight instructions from such a long distance from earth?
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Why was Pluto discredited as a planet?
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How do you calculate the distance between earth and a star?
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What are the two major forces that act on a star?
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Where are the cepheid variables? Can we see any from earth without a telescope?
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When is the tail of a comet the shortest?
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What do stars and planets look like from a telescope? Does their appearance vary depending on the type of telescope used?
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Which way does the moon and earth rotate around the sun?
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What are the colors of the stars from hottest to coldest?
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What theory describes the formation of the moon?
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How many parsec are in one kilometer?
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Why can't we get a picture of the lunar rover sitting on the surface of the moon with earth-based telescopes?
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What is the life cycle of a star?
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What are the Jovian planets? Where are they found?
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What is the size of the Earth's surface?
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How does natural gas convert to energy?
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How was the size of earth first measured?
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What evidence supports theories that water once flowed on Mars?
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What is diurnal rotation of the earth?
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How do nuclear energy plants work?
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What is the largest man-made satellite orbiting the earth?
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What planet is closest to the moon in the night sky?
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Question #ec6d0
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Why did Galileo's observations of Venus help to disprove the geocentric model of the solar system?
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Suppose we observe a Cepheid variable in a distant galaxy that brightens and dims with a regular period of about 10 days. What can we learn from this observation?
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Who was the first person to observe the moon through a telescope? What features of the moon did he identify?
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How does looking at the sun damage your eye?
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What is the angle of tilt of the earth with the vertical axis?
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How is electromagnetic radiation used in communication?
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What causes the earth to tilt back and forth to give us the seasons?
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When and where did Giuseppe Piazzi live and work?
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Saturn is approximately 1.5 billion kilometers from the sun. What is this distance in AU?
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What are circumpolar stars?
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What is the primary event that lead to the formation of the moon?
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Which is the nearest star to the Earth: The Sun or Alpha Centauri?
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What is the approximate speed at which the earth orbits the sun?
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What causes moon phases? Why is there only one full moon a month?
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Why are the images sent from Mars in black and white rather than color?
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How is electromagnetic radiation produced on the sun?
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Why do the planets all orbit in planes very close to the ecliptic?
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How does looking at the sun damage your eye?
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What is earth's size relative to the galaxy?
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How does the solar system move?
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What are all the planets relative size compared to earth's size?
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