Space Flashcards

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
Part of electromagnetic spectrum we can see
Visible light
26
Electromagnetic spectrum we cant see
Radio Infra red Gamma ray
27
Speed of light
3 times 10 to the power of 8
28
Gamma ray and x ray
Extremely high energy particles
29
Ultra violet
Active galaxies and quasars
30
Visible light
Chemical composition of stars
31
Infra red
For observation of central areas of galaxies and star forming ragions
32
Radio waves
Used to provide information about supernova, quasars etc
33
Large pressure difference between inside and outside of space craft creates
Very high temperatures
34
How old is the universe
14 billion years