【单选题】The primordial fireball would have been a dense roiling stew of radiation and elementary particles condensing out of the ______ energy, annihilating each other, recondensing, then colliding and disapp...
【单选题】Star birth, which transformed primordial gas into the countless starry galaxies of the present day universe, surged to high levels much earlier than astronomers had thought. Two teams of observers hav...
A.
an American team pointed a submillimeter telescope in Hawaii
B.
the team used Hubble space Telescope and captured optical images of some galaxies