Cosmology, Exotic Objects Could large numbers of black holes account for much of the “dark matter” estimated to exist in our universe?
Solar System Could the meteorite that formed the Hellas Basin on Mars have triggered the volcanic eruptions on the other side of the planet that created Olympus Mons?
Observing The constellation Ophiuchus lies partly on the ecliptic, so why isn’t it considered one of the zodiacal signs?
