What currents are the result of the sun and moon?

The sun is which type of star? What light of the sun that can cause partial or total blindness? What is the meaning of fastation? Who is responsible for cleaning up space junk? What is the role of the astronaut crew in the International space station (I.I.S)? A supernova explosion was observed on earth in 1987 but the explosion actually took place about 16900 years ago how is this possible? Why are the pyramids pointed to the sky? What is the distance of Earth-Moon lagrange point L2 from Earth? Why do wind turbines need to be high in the sky? How did sundials help people tell time? What type of energy is received on earth from the sun and other stars? Who was the last mission to go to the moon? What is the study of the sun? What is an example of a sentence using the word telemetry? What comparison does the author develop in the firstborn five paragraphs and what is his purpose in why exploring the ocean is mankind and next giant leap? Why is it possible for a blue moon to happen every 2.7 years? Is a galaxy bigger than a nebula? Who is the inventor of satellite? What is inside the sun that powers its immense energy and heat? How does space travel help humans?