3 ms·
Small nit: I think the Wikipedia entry is saying TON 618's mass is greater than all of the stars in our galaxy (6*10^10 solar masses, according to the article),
by pbuzbee 5y ago
Small nit: I think the Wikipedia entry is saying TON 618's mass is greater than all of the stars in our galaxy (6*10^10 solar masses, according to the article), not greater than the entire mass of the galaxy (~10^12 solar masses, according to the Milky Way article).