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Assignment 2
The Sun
22
Astronomy
Undergraduate 2
02/27/2012

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Cards

Term
In astronomy, inferometry can be used to
Definition
improve the angular resolution of telescopes
Term
The temperature of the photosphere is about
Definition
5 800 K
Term
What is the meaining of the solar constant?
Definition
The amount of energy the Earth recieves per unit area and per unit time
Term
What two energy transport mechanisms, in order from outside the core to the surface, are found in the sun?
Definition
radiation, convection
Term
The outward pressure of hot gas in the sun
Definition
is balanced by the inward gravitational pressure
Term
The solar winds blow outwards from
Definition
coronal holes
Term
From inside out, what is the correct order for the structure of the Sun?
Definition
radiative zoe, convection zone, chromosphere
Term
Visible sunspots lie in the
Definition
granulation in the photosphere
Term
As the sun rotates an individual sunspot can be tracked across its face. From eastern to western limb this takes about
Definition
two weeks
Term
The most striking example of solar variability was the
Definition
Maunder Minimum from 1645 - 1715
Term
Sunspots
Definition
come in pairs, representing the north and south magnetic fields
Term
During a period of high solar activity, the corona
Definition
is more irregular
Term
Sunspots are dark splotches on the sun. Which statement is true?
Definition
They are extremely hot, but cooler than the surrounding areas of the sun
Term
While observing the sun, you note a large number of sunspots. What can you conclude?
Definition
There are likely to be an above average number of flares and prominences
Term
The critical temperature to initiate the proton-proton cycle in the cores of stars is
Definition
10 million K
Term
In the proton proton cycle, what happens to the lost mass?
Definition
It is converted to energy
Term
The primary source of the sun's energy is
Definition
the strong force fusing hydrogen into helium
Term
In the proton proton cycle the positron is
Definition
an anti-electron
Term
Which is the net result of the proton proton chain?
Definition
4 protons = 1 helium 4 + 2 neutrinos + gamma rays
Term
Hydrogen burning by fusion reaction occrs only in the deep interior of the sun because
Definition
the requisite conditions of high temperature and density occur
Term
What happens to protons produced by the nuclear reactions in the core of the sunÉ
Definition
They collide with electrons, producing energy
Term
Which of these are not associated with the sun
Definition
granulation
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