Name some orbits a sattelite can take.
- Low earth orbit (LEO)
- Medium earth orbit (MEO)
- Polar Orbits
- Sun - Synchronous orbit
- Geostationary orbit
Name at least two types of telescopes.
*Refractor telescopes
*Reflector telescopes
Describe the geocentric model of the solar system
The beleif that earth was the centre of the solar system and that the sun and the other planets orbit around it.
Describe the timescale of the universe.
*Dark ages - 300,000 years after big bang, before stars formed, space was just empty.
* 150,000,000 years late the first stars appeared.
* 300,000,000 years later the galaxy formed.
* 4.6 billion years later, our solar system formed
* 13.8 billion years later, present day.
Describe how to get a satellite into the universe.
Prepare the satellite
Launch the satellite
Lift off the satellite.
Why could atoms not be formed in the big bang theory
Atoms couldn’t form during the Big Bang because the universe was incredibly hot and dense.
Name at least 3 different uses of sattelites
Communication
Navigation
Earth observation
Scientific research
Military defence
Draw a ray diagram of a telescope
Define telescope.
An optical instrument that gathers and magnifies light to observe distant objects.
What is the objective lens used for?
It gathers light and focuses it to form an image of a distant object.
True or false: The eyepiece magnifies the image formed by the objective lens.
TRUE
Fill in the blank: The mount stabilizes the telescope and allows for _______.
Movement
What is the purpose of a finder scope?
To help locate objects in the sky before viewing them through the main telescope.
What does a reflecting telescope use to form images?
Mirrors to gather and focus light.
True or false: A refracting telescope uses lenses to focus light.
TRUE
What is the function of a diagonal mirror?
To redirect light to the eyepiece at a more comfortable viewing angle.
Fill in the blank: The focuser adjusts the _______ of the eyepiece.
Position
Define field of view.
The extent of the observable area seen through the telescope.
What is the purpose of a filter in a telescope?
To enhance contrast or reduce glare from bright objects.
True or false: A computerized mount can automatically track celestial objects.
TRUE
What does tracking refer to in telescope use?
The ability to follow a celestial object as it moves across the sky.
