Relativistic Orbits - Page 2
Questions
- If the Earth orbited the Sun at twice its current distance, what impact would this have on the accuracy of our ground-based astrometry?
- How do we measure radial velocity of stars?
- Does the moon ever eclipse, or visibly block, other planets or visible stars. If so when did/will this happen?
- What do you call a person who specializes in astrometry?
- Why is the astrometry method more difficult than the doppler method?
- Is a planet's orbital period related to the planet's size?
- What is proper motion of stars caused by?
- How many different type eclipse are there?
- Why do astronauts in space experience less gravitational force than they do on earth?
- How do you measure the parallax angle of a star?
- The moon looks quite close to Venus at the moment. Does the moon ever eclipse Venus? How long does it last?
- What causes a solar eclipse? How often do they occur?
- How is spectroscopic parallax is determined?
- Does Canada publish any Astronomical Ephemeris or Nautical Almanac annually, such as being done in USA, UK, INDIA etc?
- How far ahead or behind can astronomers calculate planets positions? What are limits of these calculations?
- How do you specify the size of a planet?
- A star has a parallax of .19 arc seconds. The stars has a proper motion of 7.2 arc seconds per years and a radial velocity of +260 km/s. How do you find the Tangential Velocity and the total velocity of the star?
- What is the star with the largest proper motion?
- Why do all planets in our solar system go around the sun in the same way?
- What is the difference between a linear velocity from a tangential velocity and radial velocity?