Analyse Observations

The sea level rises and falls every day. These changes are called tides. Tides happen because of the gravitational pull of the Moon and the Sun on Earth's oceans. The Moon has the strongest effect because it is much closer to Earth. 

The ocean’s tides rise and fall every day, but have you ever wondered what causes them? The Moon and Sun both play a role in shaping the movement of water across the Earth. 

Galaxies are vast collections containing billions of stars, planets, and massive clouds of gas, dust, and ice. Understanding galaxies is a key part of astronomy. One important tool for studying them is classification—grouping them into a few different categories. 

The Sun is a constant presence in our life on Earth. It gives us the heat and light we need to survive. But it is not a stable place. The Sun is a ball of hot plasma which is constantly changing.