Relativistic Orbits Astrophysics General Relativity Relativistic Orbits Questions A 2300 kg rocket shuts off its engine 494km above earth's surface. Its velocity at burnout is 3000 m/s directly upward. Ignoring air resistance, what maximum height will the rocket reach? How far ahead or behind can astronomers calculate planets positions? What are limits of these calculations? What is the distance from the Earth's center to a point in space where the gravitational acceleration due to the Earth is 1/24 of its value at the Earth's surface? What are celestial mechanics? What causes celestial bodies to have gravity? How do meteoroids move? How can parallax be used to determine distances? How do you measure the parallax angle of a star? How do you measure the parallax of a star? What is tangential velocity? What is the difference between a linear velocity from a tangential velocity and radial velocity? How do we measure radial velocity of stars? How does a radial velocity measurement depend on inclination? How do you calculate the radial velocity of a galaxy? In a spectroscopic binary, if a pair shows a combined set of lines tonight, but a maximum split two nights later, what must its orbital period be? How is spectroscopic parallax is determined? What is spectroscopic parallax? Why is the astrometry method more difficult than the doppler method? What do you call a person who specializes in astrometry? 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 does astrometry differ from the doppler effect? What is astrometry used for? How do you explain an eclipse? How many different type eclipse are there? Why do solar lunar eclipses occur? Why don't we have eclipses every month? Given the following, why will more lunar eclipses than solar eclipses be visible from North America in this decade? What causes a solar eclipse? How often do they occur? What are ephemerides? What is Jupiter's ephemeris? Is there such a thing as an ephemerides equation? How are ephemerides used? How far away from the earth is Halley's comet? Does Canada publish any Astronomical Ephemeris or Nautical Almanac annually, such as being done in USA, UK, INDIA etc? What is an eclipse compared to occultation? Why are there no planetary occultations visible from Earth between 1818 and 2065, when otherwise they are comparably frequent? Can we predict when Solar System objects will occult a star? Which method relies on the mass of a dark object revealing its presence? Does the moon ever eclipse, or visibly block, other planets or visible stars. If so when did/will this happen? The moon looks quite close to Venus at the moment. Does the moon ever eclipse Venus? How long does it last? What is proper motion? What is the star with the largest proper motion? What is proper motion of stars caused by? 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? If Kapteyn's star has a parallax angle of 0.255 arcsec, a proper motion of 8.67 arcsecs per year and a radial velocity of +246 km/s, What is the star's tangential velocity? What is a reference system in terms of astronomy? Is it possible for a moon in orbit around a planet to have a secondary moon orbiting the moon itself? What is the relationship between the radius and period when talking about the rotation of planets? Two satellites are in circular orbits around the earth. The orbit for satellite A is at a height of 539 km above the earth's surface, while that for satellite B is at a height of 876 km. How do you find the orbital speed for satellite A and satellite B? What does orbit mean? What makes the planets rotate around the sun? Why do all planets in our solar system go around the sun in the same way? Question #7cd2d When do eclipses occur? What does LC mean? How is the speed of light measured? Question #99bdf How do you specify the size of a planet? Is a planet's orbital period related to the planet's size? General Relativity View all chapters Gravity Waves Black Holes Relativistic Orbits Space-Time Prev Next