Which of the following discoveries was not made by an ancient Indian astronomer? 1.The sun is the center of the solar system.
2.The sun is a star.
3.Earth is round.
4.There is a black hole in the middle of the Milky Way galaxy.

Ally just bought a plane ticket. she notices that the fare includes a september 11 security fee. what is the government’s purpose for imposing this fee? a. to pay for security at airports b. to pay for airplane maintenance c. to compensate airlines for rising fuel prices d. to pay for new government airplanes