Space Flashcards

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1
Q

Geostationary satellite

A

Period - 24 hours

Altitude - 36000 km

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2
Q

Period of a satellite in a high altitude

A

Orbit is greater than the period of a sattalite lower a Lowe altitude orbit

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3
Q

Planet

A

Astronomical boys orbiting a star

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4
Q

Dwarf planet

A

Object less massive than a planet, in orbit around a star

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5
Q

Moon

A

A natural satellite which orbits planets

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6
Q

Sun

A

Star at the centre of the solar system

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7
Q

Asteroid

A

Astronomical objects that orbits the sun

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8
Q

Solar system

A

A star and all the objects orbiting around it

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9
Q

Exoplanet

A

Planet orbiting a star other than the sun

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10
Q

Galaxy

A

Gravitationally bound system of stars

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11
Q

Universe

A

All of spaceand time and it’s contents

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12
Q

Satellite

A

Weather forecasting- used to monitor the weather and climate of earth

Communications - amplify radio telecommunication signals

Scientific discovery and space exploration - used for scientific discovery and space exploration

GPS - space based radio-navigation system

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13
Q

Challenges of space travel - ion drive

A

Travelling large distance

Ions leave the drive as an ion beam, so producing thrust.

Produces small unbalanced force

Over long period of time craft will attain high velocity

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14
Q

Catapults and slingshots

A

To attain speed and direction

Uses gravity from planet, moon, or asteroid to assist space craft

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15
Q

Zero friction evironments

A

manovering in space, which is a zero friction environment, is challenging due to there being no resistive forces

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16
Q

Life support system

A

To provide enough energy for life support

Sera of solar cell would have to increase as the spacecraft travelled further fron the sun

17
Q

Take-off

A

The thrust to propel the spacecraft out of the earths atmosphere is created by combustion of fuel

18
Q

Radiation

A

The magnetic field strength that surrounds earth protects us from most of the solar and cosmic radiation

19
Q

Radiation

A

The magnetic field strength that surrounds earth protects us from most of the solar and cosmic radiation

No magnetic field strength to defeat radiation

20
Q

Re-entry

A

Space craft exposed to high temperatures

Friction between the space craft and the atmosphere causes plasma to form around spacecraft

21
Q

Weight

A

Effect of gravitational field strength on an object

22
Q

Mass

A

Amount of mater an object has

23
Q

Light year

A

Distance light travels in one year

24
Q

What happens as wavelength of radiation decreases

A

Frequency increases so energy of wave increases

25
Q

Part of electromagnetic spectrum we can see

A

Visible light

26
Q

Electromagnetic spectrum we cant see

A

Radio
Infra red
Gamma ray

27
Q

Speed of light

A

3 times 10 to the power of 8

28
Q

Gamma ray and x ray

A

Extremely high energy particles

29
Q

Ultra violet

A

Active galaxies and quasars

30
Q

Visible light

A

Chemical composition of stars

31
Q

Infra red

A

For observation of central areas of galaxies and star forming ragions

32
Q

Radio waves

A

Used to provide information about supernova, quasars etc

33
Q

Large pressure difference between inside and outside of space craft creates

A

Very high temperatures

34
Q

How old is the universe

A

14 billion years