What is thauatrope?

What is composition of ionosphere? When were the streetlights invented? What water droplets that falls from the sky? Do you still use the chronometer? What moon has a thin oxygen atmosphere? What was the Greek god Apollo in charge of? What instrument uses NASA infrared technology to help provide hospital nursing staffs more time to devote to patient care? How does a shadow change in the day? What do cosmonauts get from their countries? How do you set time on a aw61790w? Is your sun typical or exceptional? Who is Dr. Garth Illingworth? How many days does the moon take to spin around its axis? What part of the government is NASA in? Why did engineers try to build rockets that could take people to the moon? What are the terrestrial planets from biggest to smallest? Why does every thing fly in the moon? Where can we see sunrise and sunset in one place? Is solar power harnessed UV rays? What weather system that affect the Philippines?