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Galaxies are classified into three main types: spiral, elliptical, and irregular.

Elliptical galaxies are typically spherical or egg-shaped. They are usually between

1,000

and

700,000

light-years in diameter, but some span more than

1,000,000

light-years! Most elliptical galaxies lack large amounts of gas and dust, so there is little to no active star formation within them. Although some elliptical galaxies contain trillions of stars, most of these stars are old. The stars can orbit the galactic core in multiple directions.

Select the true statements about elliptical galaxies.