Hubble Views Galaxy Lacking Dark Matter

The video discusses a unique galaxy observed by NASA's Hubble Space Telescope that lacks significant dark matter, challenging current astronomical theories. It explores the role of dark matter in galaxy formation and the possibility of alternative gravity theories. The galaxy is an ultra-diffuse type, with very low density and unusual characteristics. Researchers used various observatories to study this and other galaxies, aiming to understand dark matter's nature and its role in the universe.

What is the primary role of dark matter in the universe according to most astronomers?

• To create black holes

• To provide light to galaxies

• To form stars

• To play a fundamental role in galaxy formation

How do astronomers determine the mass of a galaxy?

• By counting the number of stars

• By observing the color of stars

• By measuring the speed of galaxy rotation

• By calculating the distance from Earth

What is a unique feature of the galaxy observed by the Hubble Space Telescope?

• It is entirely made of dark matter

• It is the brightest galaxy in the universe

• It has little to no dark matter

• It is the largest galaxy ever discovered

What characteristic makes ultra-diffuse galaxies difficult to find?

• Their high density

• Their rapid movement

• Their small size

• Their faint appearance

What unusual feature was found in the globular clusters of the studied galaxy?

• They are dimmer than usual

• They contain no stars

• They are brighter than normal

• They are moving away from the galaxy