Category Archives: Planets

Planets

Positions of the Planets on any Date

Question:  I am making a sculpture to offer to my dad with planets position at 4 of july of 1930, his day of birth. Can you help me and tell  where i can find it?  – Sérgio Answer:  There is … Continue reading

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How Do We Keep Our Space Probes From Contaminating Other Planets?

Question:  What are the chances of interplanetary space crafts, probes  and rovers carrying the air-borne bacteria and viruses and dispersing them in the target planet since they are made and assembled in earth? (Especially the rovers which landed on Mars … Continue reading

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Why is the Earth’s Orbit Around the Sun Elliptical?

Question:  Why is the Earth’s revolution around the sun elliptical rather than a perfect circle? I feel like if there is the same amount of inertia and gravity acting on the Earth at all times, the revolution would end up … Continue reading

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The Earth-Moon Spin-Orbit Resonance

Question:  For being a chunk of Earth’s primordial matter the Moon is quite an amazing stellar feat…it orbits synchronously about the earth with an axis spin velocity 1/100 that of Earth and counterclockwise orbit equal in period as that of … Continue reading

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Radio Frequency Recordings from the Planets

Question: Hello I am an experimental musician from Houston Texas. I have been searching for radio frequency recordings of the planets. Do you know if these exist? I have my mind set on attempting to compose a composition based on … Continue reading

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Solar Radiation Effects on Mars Astronauts

Question:  I have been watching a programme on the television about the preparations for a manned mission to Mars. As Mars has a very thin atmosphere the men who land on the planet will be subjected to “solar radiation”. How … Continue reading

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Why do the Planets in our Solar System Orbit the Sun Counter-Clockwise?

Question: The planets in our solar system are orbiting the Sun counter clockwise, why? Do the laws of physics dictate that all planet orbit their respective stars counter clockwise or is it possible to have a solar system where the … Continue reading

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What Happens to the Planets When the Sun Becomes a Red Giant and White Dwarf?

Question: I’ve been watching a very interesting series of television programmes in which Professor Brian Cox has been delving into Astronomy. One programme focused on the life cycle of stars. I understand from the programme that as our Sun enters … Continue reading

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Objects that Collide with Earth

Question: Hypothetical question: We hear about what would happen when the Earth is struck by comets and asteroids; the extinction of the dinosaurs for example or the end of life on our planet for us humans. In its infancy the … Continue reading

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What Happens as the Moon Moves Away from the Earth?

Question(s): The Earth’s moon is moving away from Earth by a few centimeters a year.  Will it break free from Earth’s gravitational influence before our Sun turns into a red giant and fries the inner planets of our solar system? … Continue reading

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