jorg siebeck proved that mar’s orbit is elliptical not circular.
jorg siebeck proved that mar’s orbit is elliptical not circular.
who proved that mar’s orbit is elliptical not circular?
jorg siebeck
most planetary orbits are nearly circular, and careful observation and calculation are required in order to establish that they are not perfectly circular. calculations of the orbit of mars indicated an elliptical orbit. from this, johannes kepler inferred that other bodies in the solar system, including those farther away from the sun, also have elliptical orbits.









































kepler's work (published between 1609 and 1619) improved the heliocentric theory of nicolaus copernicus, explaining how the planets' speeds varied, and using elliptical orbits rather than circular orbits with epicycles.
kepler's laws of planetary motion
transfer orbit









































in orbital mechanics a transfer orbit is an intermediate elliptical orbit that is used to move a satellite or other object from one circular, or largely circular, orbit to another.









































there are several types of transfer orbits, which vary in their energy efficiency and speed of transfer. these include:









































bullet::::- hohmann transfer orbit, an elliptical orbit used to transfer a spacecraft between two circular orbits of different altitudes in the same plane









































bullet::::- bi-elliptic transfer, a slower method of transfer, but one that may be more efficient than a hohmann transfer orbit
transfer orbit