Identify the earth motion that provides the basis for our system of local time and time zones

What is the main idea of the text: hammurabi's code

How long does it take for saturn to orbit the sun?

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks