Hi guys and welcome back to another blog. Today I will be talking about what we have been doing in the writing part of science. We have been writing about the solar system.
Here is a doc of what I did
What is a solar system - A solar system is a collection of eight planets and their moons that orbits around the sun. The planets in our solar system are in order first starting off with Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune also in order of distance from the sun. The solar system consists of stars and planets like the sun and everything that revolves around it. This also includes comets and asteroids. Dwarf planets and other small icy objects.
What is a Milky way - The Milky way is a large barred spiral galaxy and all the stars that you see at night time are in our galaxy called the Milky way galaxy. The milky way is made up of approximately 100 billion stars including our sun. The Milky Way is the galaxy in which we live. The Milky Way does not sit still. It is constantly rotating around and the sun and the solar system travel with them.
What is a star - A star is a giant luminous ball of gas which is made out of hydrogen and helium which is held together by its own gravity and nuclear fusion reactions in its core help support the star against gravity and produce photons and heat as well as some small amounts of heavier elements. Stars produce their own light and heat produced by their cores inside of them.
Describe a Nebula - A nebula is an enormous cloud of gas and dust. It occupies the space between stars and acts like a nursery for stars. A cloud of gas and dust in outer space which is visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter.
How does a star die - Most stars take millions of years to die and when a star like a sun has burned all of its hydrogen fuel it then expands to become a red giant and after puffing off its outer layers the star then starts to collapse to form a very dense white dwarf and when the helium fuel runs out the core will expand and cool. The upper layers will expand and eject material that will collect around the dying star to form a planetary nebula and then finally the core will cool down into a white dwarf and then eventually into a black dwarf.
Is there an up or down in space - There is an up and down in space? Down is simply the direction gravity is pulling you and up is just the opposite direction and since there is gravity everywhere in space there is also an up and down everywhere in space. If you are in space and the earth is the nearest object you would obviously fall towards the earth.
Can we use the stars to navigate - By observing the position of the stars that are in the sky you can find your way by using them. Star navigation has been used by seafarers for centuries and is a useful skill for any boater to know so the answer is yes. You can use stars to navigate.