Space exploration Flashcards
What is the universe
The universe is everything. It includes all of space, and all the matter and energy that space contains
Advantage of a gps satellite
The GPS system gets calibrated by its own and hence it is easy to be used by anyone.
Advantage of weather satellites
Can monitor weather in ‘real-time’
Advantage of hubble
The detail is absolutely extraordinary
What is the period and altitude geostationary satellites travel
Period - 24hrs
Altitude-36000km
Challenges in space
-producing a small unbalanced force over extended period of time.
-manouverimg in spacecraft.
-maintaining sufficient energy to operate life support systems.
Risks associated with manned space exploration
-fuel load on take off
-potential exposure to radiation.
-pressure difference
-re entry through atmosphere
What does the term light year mean?
distance that light travels in one year,
Which is 9.4607 × 1012 km.
description of the Big Bang theory
The big bang is how astronomers explain the way the universe began
Estimated age of the Earth
4.5 billion yrs
Order of em spectrum
Radio , microwave, infared, visible light, ultra violet, X-ray, gamma