Exam 9: The Sun: Our Extraordinary Ordinary Star

A typical Doppler shift in the center of a granular cell compared to the "rest" wavelength is 8.75 X 10-⁴ nm.Take the rest wavelength to be the Hα line of 656 nm.What is the corresponding material speed in the center of the cell?

Which technique has been used for the past 35 years to attempt to measure solar neutrinos?

The heliosphere is the:

What is the temperature of the solar corona?

Nuclear fusion is the:

What name is given to an irregular dark line or streak often seen in Hα photographs of the solar photosphere,often associated with sunspots?

Why is the solar corona so much hotter than the photosphere?

Where would you expect to find spicules?

What causes sunspots?

How can the rotation of the Sun be described?

The brighter cells surrounded by dark,narrow boundaries making up the cellular pattern that completely covers the visible surface of the Sun are called:

Which property does the neutrino NOT possess?

What measurements first showed the 5-minute oscillations of the Sun's surface?

Spicules on the solar surface are:

What is the name of a small jet of rising gas in the chromosphere of the Sun?

The Sun is about a thousand times more massive than the planet Jupiter.Why,then,does it have about the same average density as Jupiter?

Any object will collapse under its own weight unless something stops it.In an ordinary star like the Sun,this collapse is prevented by:

The Sun's source of energy at the present time is thought to be:

What is a plasma?

Why are sunspots cooler than the rest of the Sun's surface?