What is the surface temperature of the star Algenib?

What is a scientist who studies light called? Suppose that as earth formed all lighter elements were released to the surrounding space how might this disrupt the structure of earth today? What is the definition for crest? When a space capsule returns to earth after a mission it glows red-hot why? What would happen if you rang a bell in space? Why is the moon so large tonight? What do you mean by mastrophobia? What does the saying fog a Mirror mean? What is the emblem of Zeus? Do the inner planets have rings? Who invented the gas arc lamp? When did they start building the space station? How many miles are in 4000 light years? Why should you have a solar panel on your roof? Why did neil Armstrong want to become an astronout? When did john glen orbit the earth in friendship 7? Do solar eclipse glasses expire and if so, how can you tell when they are no longer safe to use? When will conjunction of Saturn and Jupiter take place in Pisces? Are bar codes space spin offs? Why didn't NASA send astronauts into space instead of spending millions on the pathfinder mission?