Unseen objects in our galaxy have been found by the bending effect they have on more distant stars' light passing near them. These small objects that don't emit light are calculated to have masses of about 10× the mass of the Sun. Which is the best choice for these objects

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Quizplus · Accepted Answer

The bending effect on the more distant stars' light passing near them, known as gravitational lensing, is a characteristic of objects with large mass and a strong gravitational field, such as black holes. Neutron stars and white dwarfs also have strong gravity, but the calculated masses of these objects (10× the mass of the Sun) suggest that they are too massive to be neutron stars or white dwarfs and are more consistent with the expected mass range of black holes. Main-sequence stars are visible and emit light, and therefore, cannot be the unseen objects detected through gravitational lensing.

Unseen Objects in Our Galaxy Have Been Found by the Bending