You are talking to a friend who tells you she just saw a black hole in space. How would you respond?
Tell your friend to verify her sighting through a compound telescope.
Tell your friend that black holes are too far away for us to view them without a
sextant, so it is unlikely she saw a black hole.
Tell your friend that black holes can only be detected from their quasars, and ask
her if she saw a quasar, or a glowing ring around a black spot in space.
Tell your friend that this is unlikely as black holes are invisible to the naked eye
because their light cannot travel back to us in order for us to view them.

Anight-club bouncer, now a top official, put coke or pepsi in it; first three initial. combine all lakes; but i still have more, of all the places; i have the largest shore. what am i? ?

Which statements describe sustainable development? multiple answer choice -fishing does not remove more fish from water systems than can be replaced by the number of fish that will be born to replace them. -sustainable development is development that is designed to improve the economic conditions in less-developed countries. -sustainable development is mainly a regional issue. -sustainable development means water is used at a rate that won't reduce the amount available for future use. - sustainable development policies only need to be concerned with environmental protection. - trees cannot be cut down faster than the number that will be replaced by new growth.

The amazon river is in africa true or false