It's an area that is organized around a focal/nodal point where there is a central focus. The central diminishes as you move outwards from the point. Generally used to display information about economic activities.
Answer:
Which type of electromagnetic radiation do astronomers use to look at neutron stars?
Explanation:
We can hunt for hot neutron stars by looking for X-ray sources. Although most of the light from neutron stars is emitted at X-ray wavelengths, the nearest neutron star can also be glimpsed at visible wavelengths.
The planet known for having large amounts of iron oxide in its soil and polar ice caps is Mars. Mars is actually the second smallest planet in our solar system. It is actually the fourth planet from the sun. This planet is also known by the name of Red Planet because of its red soil. This reddish color of the soil is due to the high content of iron.
