Author Question: Shapley correctly argued that the rotation of the spiral nebulae proved they could not be very ... (Read 50 times)

lidoalex · **on:** Jul 27, 2018

Shapley correctly argued that the rotation of the spiral nebulae proved they could not be very distant.

Indicate whether the statement is true or false

Question 2

Physicists have detected hot dark matter particles in terrestrial laboratories, but it is much harder to observe than cold dark matter.

Indicate whether the statement is true or false