The profound idea—that almost every element in the human body was formed in the core of an ancient star—is absolutely true and is one of the most remarkable facts in science. The Big Bang’s Ingredients… Starlight Factories: We’re made stellar

We often hear the awe-inspiring statement that there are roughly stars in the universe. The number most commonly used to complete this statement is , which is ten sextillion (a 1 followed by 22 zeros).… Are there really more stars in the Universe than sand on earth?

In the middle of the summer of 1264, the night sky suddenly blazed with a strange, awe-inspiring light.From Europe all the way to Asia, people witnessed it: a massive comet with a tail stretching nearly… The Great Comet of 1264

Detailed explanation: We see different phases of the moon, including a half moon (first and last quarters) and a full moon, due to the moon’s position relative to the Earth and the Sun. The phase… The moon scooped…! Why do we see only a moon half?