Although dark matter is invisible, its location can be mapped by its gravitational lensing effect on background objects.
Answer the following statement true (T) or false (F)
True
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The distance to an imaginary star is 2 pc when measured via parallax. What will this distance be when represented using Astronomical Units?
A) 4.12 x 105 AU B) 6.79 x 104 AU C) 2.34 x 102 AU D) 9.11 x 107 AU
Of the earliest known planets, which exhibits retrograde motion?
A. Mars and Mercury B. only Mars C. Mercury, Venus, and Mars D. All of these choices are correct. E. None of these choices is correct.
When the intensity of light is increased in a photoelectric effect experiment, the energy of the emitted electrons __________
Fill in the blank(s) with correct word
All large astronomical telescopes built since the start of the 20th century have been _______________ telescopes
Fill in the blank(s) with correct word