Apparent Magnitude of Stars
Does the apparent brightness of a star determine how far away it is? Why?
No, the brightness of a star does not indicate it's distance from Earth. This is because stars have different intrinsic brightnesses.
What is magnitude?
A term used by scientists that is a measure of the brightness of objects
What does the unit of measure nm stand for?
Nanometers.
Can we see colours in stars? Why?
We can only see colour in the brighterst stars because the faintest starts are too weak to trigger the color receptors in our eyes. If we had more sensitive colour receptors in our eyes, we’d be able to see colours in many more stars
If 2 stars have the same absolute magnitude, what does this mean?
If 2 stars have the same absolute magnitude, they emit the same amount of light because absolute magnitude is a measure of how much light stars produce.
What telescope can detect wavelengths above 1m?
Very large array.
What does the scale of apparent magnitude measure?
This is a measure of how bright stars appear from Earth. It depends on how much light the stars produce and how far away they are.
What is the distance in light years that is used to view stars in absolute magnitude?
32.6 light-years
Which telescope would be most suitable for detecting wavelengths of 0.2nm
Chandra
What does the naked eye limit mean and how can we assess it?
The naked eye limit is he faintest stars visible to the naked eye have a magnitude of +6.5.
If star a has absolute magnitude is -0.6 and star b is 1.5, which is the brighter star?
star a, because the lower the magnitude, the brighter the star. This applies for both apparent magnitude and absolute magnitude.
Which 2 telescopes can detect Infrared waves?
Hubble and Spitzer
Which star that we looked at is the brightest and why? What is it’s apparent magnitude?
The brightest star is Sirius because it has the lowest magnitude, which is -1.5.
What does absolute magnitude measure?
The absolute magnitude of a star is defined as the magnitude it would have if it were viewed at a standard distance.
If the giant star Meissa has a surface temperature of about 35,000°C, and a small red star has surface temperatures of 2000°C to 4000°C, which star produces more energy? Why?
Giant star Meissa. Hot stars have high energy and release short wavelengths, such as ultraviolet radiation.