A(n) ____________________ eclipse occurs when the Moon is at its greatest distance from Earth and the Moon is new and at a node in its orbit
Fill in the blank(s) with correct word
annular
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The sidereal drive on a telescope mounting must turn the telescope eastward about the polar axis
Indicate whether the statement is true or false
The discovery of the gravitational lens effect for quasars
a. shows that quasars were located within the local group of galaxies. b. shows that quasars were giant planets in our solar system. c. shows that quasars are much further away than the distant galaxy that forms the gravitational lens. d. proves Newton's theory of gravitation by showing that the photon was affected by gravity. e. proves the existence of super massive black holes at the center of active galactic nuclei.
The net force on an object is in the positive x-direction. Consider the following statements. (I) The object can be moving in the negative x-direction. (II) The object can be speeding up. (III) The object can be slowing down. (IV) The object can be moving in the positive y-direction. Which of the statements are true?
a. (I) and (II) b. (II) and (III) c. (III) and (IV) d. Choose this answer if all the statements are true.
About how long is the solar cycle (evidenced by the polarity of the Sun's magnetic field)?
A. 3 years B. 22 years C. 5 days D. 11 years