The Orion Nebula is a gaseous cloud in space containing numerous new stars.
When viewing it through a high-powered telescope, an observer sees what the
nebula looked like 1,500 years ago. How is this possible?

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.