Space exploration Flashcards

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1
Q

What is the universe

A

The universe is everything. It includes all of space, and all the matter and energy that space contains

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2
Q

Advantage of a gps satellite

A

The GPS system gets calibrated by its own and hence it is easy to be used by anyone.

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3
Q

Advantage of weather satellites

A

Can monitor weather in ‘real-time’

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4
Q

Advantage of hubble

A

The detail is absolutely extraordinary

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5
Q

What is the period and altitude geostationary satellites travel

A

Period - 24hrs
Altitude-36000km

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6
Q

Challenges in space

A

-producing a small unbalanced force over extended period of time.
-manouverimg in spacecraft.
-maintaining sufficient energy to operate life support systems.

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7
Q

Risks associated with manned space exploration

A

-fuel load on take off
-potential exposure to radiation.
-pressure difference
-re entry through atmosphere

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8
Q

What does the term light year mean?

A

distance that light travels in one year,
Which is 9.4607 × 1012 km.

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9
Q

description of the Big Bang theory

A

The big bang is how astronomers explain the way the universe began

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10
Q

Estimated age of the Earth

A

4.5 billion yrs

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11
Q

Order of em spectrum

A

Radio , microwave, infared, visible light, ultra violet, X-ray, gamma

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