Astrophysics

Astrophysics is a fun science that helps us learn about stars, planets, and other amazing things in space. It uses the same rules that we know from physics and chemistry to understand what these objects are made of and how they behave.

One of the early experts, James Keeler, said astrophysics is about learning the nature of objects in the sky—like their composition and properties. People study many wonderful things, such as the Sun, other stars, galaxies, planets outside our solar system called extrasolar planets, and even the faint glow from the beginning of the universe known as the cosmic microwave background.

Astrophysicists look at light and energy from these objects to learn about their brightness, temperature, density, and what they are made of. They study how objects move, how electricity and magnetism work, and how heat and energy behave. Today, they also explore mysterious subjects like dark matter, dark energy, and black holes, as well as ideas about the origins and future of the entire universe.

Astrophysics began in the 1600s when scientists like Galileo, Descartes, and Newton discovered that the same materials and rules apply to both the sky and Earth. In the 1800s, scientists found special patterns in the Sun’s light, called spectra, which helped them learn what elements, like gases, were in the Sun. This led to the creation of astrophysics. Today, many students enjoy learning about this exciting field, and famous teachers such as Stephen Hawking and Carl Sagan help share this knowledge.