modern perspective of the universe
A unit of astronomical distance equivalent to the distance that light travels in one year, which is 1013 km.
what is light year?
Energy can change between many different forms, such as potential, kinetic, and thermal, but the total quantity of energy in the universe never changes.
what is the conservation of energy
this light has a higher energy per photon than most other lights. Therefore, it has higher frequency, shorter wavelength.
what is gamma ray?
This telescope uses a transparent glass lens to focus light
What is refracting telescope?
The age of this star system is one third the age of the universe
what is the Solar system?
According to this law of physics, an object moving in a straight line at 100 miles/hr will continue to move in a straight line at 100 miles/hr until it is acted upon by a net force.
Newton's first law of motion
This physics law states that the black-body radiation curve for different temperatures will peak at different wavelengths that are inversely proportional to the temperature.
What is Wien's law?
Suppose you are heating two chunks of metal of the same size and shape. One is made of lead and is heated to 400 K. The other is made of iron and is also heated to 400 K. The two spectra should peak at the same wavelength.
This telescope uses mirror to focus light
What is reflecting telescope?
You, Earth, solar system, Milky Way Galaxy, Local Group, Local Supercluster, universe
This physics law explains why a skater can spin faster by pulling their arms closer to their body, or spin slower by spreading their arms out
what is the conservation of angular momentum?
Banana appears yellow is because of these two kinds of interactions between light and matter
what is reflection and absorption
(banana reflects yellow light and absorbs other colors)
These wavelength regions can be studied with telescopes on the ground
What are radio and optical?
We look at an object that is 1 million light-years away we see it at this age of its time.
When was 1 million years ago?
A change in velocity (in speed, direction, or both speed or direction)
What is acceleration?
the apparent change in frequency (wavelength) of a wave for observer moving relative to the wave source
What is doppler shift?
If an emission line appears at 600 nm in the laboratory, we say infer that an object with an emission line at 680 nm is moving away from us.
Through this technique, we are able to take the first picture of a blackhole. It allows two or more small telescopes to achieve the angular resolution of a much larger telescope.
What is interferometry?
Suppose we imagine the Sun to be about the size of a softball, this planet is the size of a tip of a ballpoint pen about 15 meters from the Sun.
What is Earth?
the first scientist realize that the laws of motion on Earth also applied to celestial objects
who is Newton?
The same speed gamma ray, X-ray, and radio travel
What is the speed of light?
The most two important qualities for a telescope.
What are angular resolution and collecting area?