Space Systems

A star constellation is a group of stars that form a recognizable pattern in the night sky. For thousands of years, people have named constellations,

Stars are massive spheres of hot, glowing gases that produce energy through nuclear fusion. The energy from stars, including our Sun, powers the solar

Stars are massive, glowing spheres of gas that generate energy through nuclear fusion. They vary in size, color, and temperature. Scientists classify

Stars are born from vast clouds of gas and dust in space called nebulae. Gravity pulls these particles together, causing them to heat up and form a de

A main sequence star is a star in the most stable phase of its life cycle. During this stage, the star generates energy by fusing hydrogen nuclei into

Stars go through different stages in their life cycles. After spending millions or even billions of years as a main sequence star, they begin to chang

The Sun is a massive ball of hot gases that provides light and heat to Earth. Scientists study its interior to understand how it produces energy and i

The Sun's outer layers are where light and energy travel from its interior into space. These layers regulate solar activity, including sunspots, flare

The Sun is a massive ball of hot gases with a constantly changing surface. It has several key features, including sunspots, solar flares, prominences,

Science and Engineering Practices (SEP): Developing and Using ModelsScientists create models to study gravity and its role in the solar system. These

The solar system is divided into inner and outer planets, each with unique characteristics. The inner planets, Mercury, Venus, Earth, and Mars, are sm

Mercury is the smallest planet in the solar system and the closest to the Sun. Its rocky surface is covered in craters, and it experiences extreme tem

The Sun and planets formed from a vast cloud of gas and dust known as the solar nebula. Around 4.6 billion years ago, gravity pulled this material tog

Earth formed approximately 4.6 billion years ago from a cloud of dust and gas left over after the Sun’s formation. Gravity pulled these particles toge

The Moon is Earth's only natural satellite and plays a vital role in stabilizing Earth's rotation and influencing tides. Scientists believe the Moon f

Earth’s atmosphere and oceans have changed significantly since the planet formed about 4.6 billion years ago. In its early history, Earth had a thick

Everything around us is made of tiny particles called atoms. Atoms are the smallest units of matter and are the building blocks of all substances. Whe

Earth may look flat from where we stand, but it is actually an oblate spheroid—meaning it is mostly round but slightly flattened at the poles and bulg