What Is the Cosmic Microwave Background and Why Does It Matter?
The Cosmic Microwave Background, often called the CMB, is one of the most important discoveries in modern astronomy. It is a faint glow of radiation that fills the entire universe and can be detected in every direction of the sky. Although it is invisible to the human eye, sensitive instruments reveal it as a uniform […]
What Is the Brightest Object in the Universe?
The question of what is the brightest object in the universe forces astronomers to think carefully about how brightness is defined and measured across enormous distances. In everyday life, brightness is judged by appearance, but in astronomy appearance can be misleading. Objects that look faint may release enormous amounts of energy, while objects that appear […]