Science — 7-topic bundle

When we measure things in science, we're trying to describe the world quantitatively. This means using numbers and units. However, no measurement is perfect. There are always limits to how precisely we can measure something.

Photo by Castorly Stock on Pexels

Photo by cottonbro studio on Pexels

Photo by Ann H on Pexels

The conditions in the Sun's core are perfect for fusion:
* Extreme Temperature: Around 15 million degrees Celsius. This super-heats the hydrogen into a plasma, where electrons are stripped from their atoms, leaving bare nuclei.
* Immense Pressure: About 250 billion times the atmospheric pressure at Earth's surface. This pressure, caused by the Sun's immense gravity, forces the hydrogen nuclei incredibly close together.

Photo by Nicolas Outin on Pexels

Photo by Landiva Weber on Pexels

The Sun is a middle-aged G-type main-sequence star – a fancy way of saying it's a yellow dwarf star that's currently fusing hydrogen into helium in its core. This fusion process releases an incredible amount of energy, primarily as electromagnetic radiation (like visible light, UV rays, and infrared heat) and a stream of charged particles called the solar wind.