Science As Earth wobbles due to precession, do the seasons change in regard to the months (i.e., 13,000 years from now, will June be winter for the Northern Hemisphere and December summer)?
Cosmology If the light from a galaxy traveled 13.3 billion years to reach Earth, does that mean the light left this galaxy when the universe was 500 million years old? Was the galaxy 13.3 billion light-years away from Earth then?
Science In my astronomy studies decades ago, we used the “Roche limit” to determine when a smaller body is too close to survive a larger object’s gravitational force. Do astronomers still use that term?
