What is the minimum mass requires for a star?

The moons of Mars are

During star formation, the dense parts of the molecular cloud that collect material while contracting and heating up are known as

Use the following table to answer the question. Star Apparent Magnitude (m) Absolute Magnitude (M) m-M Spectral Type 1 -1.46 1.46 0 F0 2 -0.72 -2.5 1.78 A1 3 0.12 -8.1 8.22 B8 4 0.41 -7.2 7.61 M2 5 -0.27 4.4 -4.67 G2     In which star’s spectrum are the hydrogen lines the strongest?

Use the following table to answer the question. Star Apparent Magnitude (m) Absolute Magnitude (M) m-M Spectral Type 1 -1.46 1.46 0 F0 2 -0.72 -2.5 1.78 A1 3 0.12 -8.1 8.22 B8 4 0.41 -7.2 7.61 M2 5 -0.27 4.4 -4.67 G2     Put the stars in order from Hottest to Coolest.

The question asked in Olber’s Paradox of cosmology is

The cause of the Mariana Trench on the west coast of the United States is

How many fundamental forces are known in science?

Lenticular galaxies are similar in structure to a spiral galaxy. Which feature are they missing?

Why does the Earth have seasons?