2 ms·
No. We know it's grease because it absorbs certain wavelengths of light, unlike dark matter, which doesn't interact with light. Besides, it's just tiny part of
by jwilk 8y ago
No. We know it's grease because it absorbs certain wavelengths of light, unlike dark matter, which doesn't interact with light.
Besides, it's just tiny part of the galaxy (1E37 kg vs >1E42 kg).