The hobby–eberly telescope has a diameter of 9.2 m. the hale telescope has a 5.1 m diameter. how many times larger is the light‑gathering power of the hobby–eberly telescope compared to the hale telescope?

What happens to rock when acid reacts with it?

What does the kyoto protocol aim to reduce

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