Lesson 1 What are the characteristics of the Earth´s Sun and Moon?
The sun does not have solid surfaces. Sun Loops of gases called prominences spread out from the sun. Is a star made of hot gases called plasma that make it glow. Eruptions of gases called solar flares can sometimes be seen on the sun. Inside the sun is a heavy core with very hot temperature. Particles react with each other and release energy that provides Earth with light and heat.
Earth´s Moon The moon has no light of its own. The moon´s surface is like a giant rock and has no atmosphere. The moon rotates on its axis and revolves around Earth. The same side of the Moon is always seen on Earth this is because the time of one rotation and one revolution of the moon is 28 Earth days.
Phases of the Moon Different shapes the moon seems to have, they change because the size of the lighted part we can see from earth changes. Phases New Moon- is the dark phase of the moon this is when unlighted side of the Moon traces Earth. The Moon is waning when you see less of it each night and it begins to grow smaller. The Moon is waxing when begins to grow larger and you can see more of each night. A cycle of Moon phases occurs about every 28 days. Full Moon is when the whole Moon is lighted.
Learning about the Moon 1959 An unmanned spacecraft first reached the Moon. The Soviet spacecraft Luna 2 landed on the Moon. 1969 Two American astronauts were the firsts humans to land on the Moon. Apollo ll with astronauts Edwin and Neil Armstrong walked on the Moon. Five more spacecraft landed on the Moon after Apollo ll.