Answer:
Pre-dusk, early to medium twilight phases allow outdoor activities without using artificial lighting
Explanation:
Civil twilight is a term, and we describe it as "the time after sunset and before sunrise ends or begins when the sun seems to be about 6 degrees underneath the horizon during which the light for normal outdoor occupations is adequate on clear days.
Nautical twilight is the second stage of twilight. By this time, both horizon and the brighter stars are easily visible, making navigation around sea possible.
Astronomical twilight occurs whenever the Sun is under the horizon between 12° and 18°
Pre-dusk, early to medium twilight phases allow outdoor activities without using artificial lighting
Stars in the main sequence are fusing Hydrogen into Helium in their cores.
Answer:
inner core
Explanation:
it is different from the crust of the the as it is hotter than the crust of the earth. nickel and iron are found in the inner core where Earth's crust is composed of igneous, metamorphic, and sedimentary rocks.
<em>HOPE</em><em> </em><em>ITS</em><em> </em><em>HELPFUL</em><em>!</em>
Answer:
Old age and hundreds of thousands of stars, only about 30 ly wide
Explanation:
A globular cluster is a collection of stars which are bound by a very strong force known as gravity (gravity is the force of attraction between two bodies). The gravity then causes globular clusters to have a spherical shape with a high number of stars closer to the center (where the gravity is strongest).
These stars are usually very old and the diameter of the clusters are usually only 30 lightyears wide because of the strong gravity.
