What is obserpation?

How can light be used to communicate? What was the treaty that stopped nuclear testing in the atmosphere? What is the most important fact about the stratosphere? How does the eclipse through tree leaves affect the surrounding environment? If a star has a large luminosity and also a low surface temperature then it must have? Can meteorologist predict where and when a tornado will occur? How many Apollo 11 blew up in space? How would you say cloudy in french? Why can't vampires come out in the sun? Is gravitational force a property of all objects? Where are the stars during daytime? How man days does it take for the moon to go through all its phases? Which theory developed when kings claimed that god gave them the authority? What is the moon really composed of? Can the milky substance from Euphorbia Aeruginosa damage the eye? What color is formed when all the colors are reflected? Is there a connection between Hermes and Hestia? Desribing words for moon that are alliteration? Which part will you adjust if the specimen you are observing under the HPO is not clear? Why was the hoisting gear important in 1421 by Filippo Brunelleschi?