The precession of the Moon's nodes means that
A) there are never two solar eclipses in the same year.
B) the vernal equinox will be in Aquarius in a few hundred years.
C) there is a lunar eclipse every 6 months.
D) there is a solar eclipse every 6 months.
E) the eclipse seasons occur less than 6 months apart.
E
You might also like to view...
In order for you to get out of bed with the least amount of work, would it be better for your bed to be on the floor or a meter high?
A) It makes no difference, because you must change your position from lying down to standing up in either case. B) It makes no difference, because the total amount of physical work done in either case is zero. C) Both of the above. D) It would be better for the bed to be on the floor, because then you would not need to do as much work to get your feet down onto the floor. E) It would be better for the bed to be a meter high, because then you would not need to do as much work in lifting yourself to your feet.
The gush of steam that issues from the escape valve of a pressure cooker is relatively cool
A) close to the opening. B) above the opening where vapor is visible. C) both of these D) none of the above
Which of the following was not a major advantage of Copernicus's Sun-centered model over the Ptolemaic model?
a. It made significantly better predictions of planetary positions in our sky. b. It offered a more natural explanation for the apparent retrograde motion of planets in our sky. c. It allowed calculation of the orbital periods and distances of the planets.
Light Travel Time: Because of the finite speed of light, we see more distant objects as they were in the past. For example, we see the star Alpha Centauri as it was 4.4 years ago, and the Andromeda Galaxy as it was 2.5 million years ago
Astronomers are often asked how we know that these objects still exist when we look at them in the night sky. How would you try to answer this question?