We usually find dark molecular clouds beside bright emission nebulae

Indicate whether the statement is true or false


TRUE

Physics & Space Science

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The first spacecraft to return surface samples of an asteroid was named

A) Dawn. B) Stardust. C) Giotto. D) Hayabusa. E) NEAR.

Physics & Space Science

The energy level diagram for hydrogen


The energy of the most energetically possible photon emitted is

a.
1.5 eV.

b.
1.9 eV.

c.
3.4 eV.

d.
10.2 eV.

e.
13.6 eV.

Physics & Space Science

Refer to the figure above showing the abundance of elements in the galaxy relative to hydrogen. What is the least abundant element with an atomic number less than iron's?

A) hydrogen B) lithium C) beryllium D) nitrogen

Physics & Space Science

What happens after a helium flash?

A) The core quickly heats up and expands. B) The star breaks apart in a violent explosion. C) The core suddenly contracts. D) The core stops fusing helium. E) The star starts to fuse helium in a shell outside the core.

Physics & Space Science