Local Solar Time is based on the sun’s position. The Earth is rotating about its axis and also orbiting the sun, therefore the sidereal day is shorter than the solar day. Thus a sidereal clock runs faster than a solar clock. A sidereal clock gains about 4 min/day or 2 hours / month on a solar clock. The two clocks coincide at noon on the Vernal Equinox. (Use these approximations; the exact equations are complicated because of the detailed geometry)

March 21: 9 pm solar time ? 09 : 00 hrs. sidereal time

May 21: 9 pm solar time ? 13:00 hrs. sidereal time

May 26: 9 pm solar time ? 13:20 hrs. sidereal time (I noticed the error should be 13 and not 03.)

On April 29, an astronomer observes from the stars that his local sidereal time is 11:25 hrs.,

What is his local solar lime?

April29: 9:53 solar time ? 11 : 25 hrs. sidereal time

Answer rating: 100% (QA)

Since the sidereal clock gains 4 minday 2 hrs month on a solar clock and the two clocks coincide at ... View the full answer