Category Archives: Solar System

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

Posted in Planets, Solar System | Tagged , | Leave a comment

Can the VLA and VLBA be used to Detect Rouge Asteroids?

Question: I’m wondering if the VLA/VLBA dedicates any observation time keeping an eye out for rouge asteroids which might intersect near our orbit?  – Doug Answer: The Very Large Array (VLA) and Very Long Baseline Array (VLBA) are not well … Continue reading

Posted in Asteroids, Telescopes | Tagged , | Leave a comment

Is Kepler’s Second Law Wrong?

Question:  I am suspicious about Kepler’s area law.  Such law should not exist.  I am finding “the cycling velocity of the celestial body is constant and not the swept out area”.  How to prove that area 1/2*r*Vp=constant?  In addition I … Continue reading

Posted in Physics, Solar System | Tagged , | Leave a comment

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

Tagged , Leave a comment

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

Posted in Planets, Solar System, Uncategorized | Tagged , | Leave a comment

Where is Voyager 1 Headed and When Will It Get There?

Question:  The Voyager 1 spacecraft has left our solar system and is now in interstellar space but where exactly is it heading now and at its present speed how long will it take to get there.  – David Answer:  I … Continue reading

Tagged , Leave a comment

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

Posted in Physics, Planets, Solar System | Tagged , , , | Leave a comment

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

Posted in Planets, Solar System | Tagged , | Leave a comment

What Would Happen to the Orbit of the Moon if it Were Twice as Massive?

Question:  If the Moon was twice more massive and if it had the same orbital speed, would its orbit change?  Further from Earth (because of the centrifugal force), or closer to Earth (because of the gravitational force) or the same … Continue reading

Posted in Physics, Solar System | Tagged | Leave a comment

Comet or Asteroid Impact on Earth’s Ocean

Question:  I have been watching a programme on the Science channel of the dangers that will ensue when the Earth is struck by a comet or asteroid; extinction of species; damage to our atmosphere and the possible destruction of whole … Continue reading

Posted in Solar System, Uncategorized | Tagged | Leave a comment