Foundation of know-how I see colours Do you see what I see? Who Am I? The Final Frontier Hodge Podge

Which “plane” does azimuth measure?

The horizontal plane.

Why is point of view important in frame of reference questions?

It is important to determine from which point the action is being observed.

What were the myths of previous cultures based on?

Their observations and life experiences.

When the heliocentric model was proposed what were some arguments against it?

-If the Earth was rotating, how did we stay on the planet. -We should have a fast easterly wind if we were rotating. -We are the most important part of the universe…aren’t we?

Explain how to draw an ellipse.

Two pins and a loop of string. By moving the pins apart an oval shape is achieved. The closer the pins, the more circular the orbit.

What are the three types of spectra?

Emission or bright line, continuous and absorption or dark line spectrum.

A diffraction grating is used to create spectrums in what devices?

Spectroscopes

Which way is a star moving if it’s light is red-shifted?

Away from us (Earth)

The spectrum of the moon should be the same as…?

THE SUN!!!

What does light have to pass through to produce a dark line spectrum?

Light passes through cooler gas.

Why do telescopes need adaptive optics?

It compensates for atmospheric distortion

What is interferometry?

Signals from more than telescope are combined into one image.

Hatchoria is a star that is 5.23 light years away. How many AU’s is this distance? (63240 AU = 1 light year)

AU

When triangulating the distance to a far away object, why do you want a longer baseline?

Because it is more accurate.

Outline the steps of triangulation.

1.Scale 2.Draw a baseline 3.Measure angles 4.Connect the baseline to the point/object 5.Measure from the point to the baseline (90 o )

List the 4 inner, or terrestrial planets.

Mercury, Venus, Earth and Mars

Which planet is the biggest?

Jupiter

Why is Pluto not considered a planet?

It is too small.

What are the Sun spots that Galileo observed?

Cooler spots on the Sun’s surface.

List 2 reasons why Mars is the best choice for a human colony.

-Close to Earth -Has an atmosphere -Comparable gravity -Temp range is suitable

Which country was the first to put a person in space?

The Soviet Union

The speed at which exhaust leaves the rocket is called?

Exhaust velocity.

List 2 challenges for life support in space.

-No atmosphere -Extreme temperature -Gravity

A way to accelerate a spacecraft using a planets gravity.

Gravitational Assist

Name 3 things that computers are used for by space engineers.

-Calculate orbits -Keep track of satellites -Collect, store, and analyse data -Execute maneuvers of satellites

1 AU = __________ km (Distance between the Earth and the Sun)

1 AU = 149,597,870,691 ± 30 metres (nearly 150 million kilometres

How do CCD’s capture images of objects in space?

They convert light signals into electronic signals in digital format.

How many GPS satellites are required to pinpoint your location?

Three

Which satellite will cause a dish to turn as it tracks it; Geosynchronous or Low Earth Orbit?

Low Earth Orbit

If there is no friction in space, how do probes speed up or slow down?

Gravity