Navigation In Space Hur3

Navigation In Space?

What is a solar system?

The solar system consists of the Sun, planets, dwarf planets,

moons, and numerous smaller objects such as comets and asteroids.

What is a milky way an example of?

The Milky Way galaxy is part of a group of galaxies called the

Virgo Super cluster. The closest neighbours are the Large and

Small Magellanic Clouds and the Andromeda galaxy.

What is a Star?

A star is a sun and a star is a luminous ball of gas,

mostly hydrogen and helium held together by its own gravity.

Nuclear fusion reactions in its core support the star against gravity and

produce photons and heat, as well as small amounts of heavier elements.

The Sun is the closest star to Earth.

Describe a Nebula?

A nebula is a cloud of gas and dust in interstellar space.

Every nebula contains hydrogen and helium and a mixture of other gases.

Our galaxy has many nebulae and astronomers have found these

clouds in other galaxies as well.

How do stars die?

Stars die because they exhaust their nuclear fuel.

Really massive stars use up their hydrogen fuel quickly but

are hot enough to fuse heavier elements such as helium and carbon.

Once there is no fuel left the star collapses and the outer

layers explode as a supernova and explode everywhere.

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. 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 fall towards earth.

How can stars be used to navigate?

The Navigational Star Chart can be used to calculate

position by finding the circle of position of three separate stars.

The point where those circles intersect is the location of the boat.