We now (know, knows) that Galileo, with his improved telescope, first confirmed that the light source was the stars.

We now know that Galileo, with his improved telescope, first confirmed that the light source was the stars.

Explanation:

cassius, casca, and their allies plant false documents to manipulate brutus to join their cause to remove caesar. after doing so, they visit brutus at night in his home to persuade him of their views. there they plan caesar's death. brutus is troubled but refuses to confide in his devoted wife, portia. on 15 march, caesar's wife, calpurnia, urges him not to go to the senate. she has had visionary dreams and fears the portents of the overnight storms.

i believe that dan is so anxious because he dose not know what awaits him when he gets there. but i dont know to be honest