Answers edited by chandramohanPanakkal

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