In the solar neighborhood we can map the position of spiral arms by observation of objects that are determined to be relatively ________ in age
Fill in the blank(s) with correct word
young
You might also like to view...
The brightest main-sequence star in a cluster has a temperature of 10,000 K and a luminosity about 100 times greater than the sun. What is the approximate age of the cluster?
A) About 1011 years B) About 107 years C) About 109 years D) This cannot be answered using the HR diagram.
Where have scientists begun an active search for life beyond the Earth?
A) Mars B) Venus C) the Moon D) Titan E) Europa
In which general direction should you look to see the Moon rise?
A) north B) south C) east D) west E) It depends on the phase of the Moon.
What eventually halts the gravitational collapse of an interstellar gas cloud that forms a brown dwarf rather than a true (main-sequence) star?
A) The central object becoming hot enough to sustain nuclear fusion in its core B) Degeneracy pressure caused by the high density of electrons in the core C) Thermal pressure from the high core temperature D) The onset of convection in the object's outer layers