Answers edited by chandramohanPanakkal
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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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How does the solar system move?
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What is the approximate speed at which the earth orbits the sun?
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How does the sun affect our tides?
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How many parsec are in one kilometer?
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Where did the Apollo Missions land on the moon?
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What is the size of the Earth's surface?
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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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How was the size of earth first measured?
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What is the angle of tilt of the earth with the vertical axis?
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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 are all the planets relative size compared to earth's?
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What is the life cycle of a star?
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What is precession?
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What does the Hubble Space Telescope do?
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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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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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Do astronomers have satellites orbiting other planets in our solar system?
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What is the distance from earth to the sun in light years?
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What causes the earth to tilt back and forth to give us the seasons?
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How long would it take us to travel to Pluto in years?
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How does solar energy convert the heat energy into electrical energy?
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How do scientists test the pH of soil?
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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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What is the primary event that lead to the formation of the moon?
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What are circumpolar stars?
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Which is the nearest star to the Earth: The Sun or Alpha Centauri?
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Where are the cepheid variables? Can we see any from earth without a telescope?
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Which planet in our solar system is most earth like?
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Saturn is approximately 1.5 billion kilometers from the sun. What is this distance in AU?
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Do all stars look like our sun?
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At what point does the ecliptic cut the celestial equator?
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Why are astronomical units used?
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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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What are the Jovian planets? Where are they found?
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What are all the planets relative size compared to earth's size?
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How is electromagnetic radiation used in communication?
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What is the largest man-made satellite orbiting the earth?
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What are the two major forces that act on a star?
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What are some similarities and differences between Venus and Earth?
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Is a yellow star, such as the sun, hotter or cooler than an orange star?
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Why is the Sun different from other stars in the universe?
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What is diurnal rotation of the earth?
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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 theory describes the formation of the moon?
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What is beyond our solar system?
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How does an electric motor operate?
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How is electromagnetic radiation produced on the sun?
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What causes a nova explosion?
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How does looking at the sun damage your eye?
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Question #5243b
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How does aneroid barometer works?
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What causes moon phases? Why is there only one full moon a month?
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What are the colors of the stars from hottest to coldest?
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What is the nearest star to earth?
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How does looking at the sun damage your eye?
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When and where did Giuseppe Piazzi live and work?
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How far are we away from the sun during the winter compared to the summer?
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Which way does the moon and earth rotate around the sun?
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How does natural gas convert to energy?
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How do refracting and reflecting telescopes differ?
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How can electric energy be produced?
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Why do the planets all orbit in planes very close to the ecliptic?
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What evidence supports theories that water once flowed on Mars?
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When is the tail of a comet the shortest?
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Does the earth spin slower on the northern and southern latitudes ?
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How do refracting telescopes work?
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Why was Pluto discredited as a planet?
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When a comet is at perihelion does it have a brighter tail?
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How do you calculate the distance between earth and a star?
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What are the sizes of Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto?
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What is earth's size relative to the galaxy?
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Why does the moon exhibit phases?
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How do nuclear energy plants work?
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What are the approximate size differences between the Earth and the Moon?
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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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How many orbits had the sun completed just after the formation of solar system?
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What is the circumference of the Earth's orbit around the Sun?
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What planet is closest to the moon in the night sky?
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What are sun and stars made of?
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Why are the images sent from Mars in black and white rather than color?
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What are the southern hemisphere constellations?
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What enables us to see different stars and constellation during different seasons?
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How many parsecs are in one mile?
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