in 2017 nasa had lots of ideas to help find smaller asteroids. they want to find 9 out of 10 of the asteroids that are bigger than 140 metres (as long as two jumbo jets). the ideas should help find asteroids which are smaller than 140 metres long too. quite a lot of the ideas use a new telescope on the ground working with a new space telescope. an example telescope on the ground is lsst. an example telescope in space is neocam, but nobody has started building it. these new telescopes will be expensive. but, nasa has done most of the work finding asteroids already. out of all the asteroids ever found, nasa has found more than 9 out of 10 of them. asteroids hit all over earth, not just the usa where nasa is from. because of this, nasa was asked by the united states government to find other countries to help. they need other countries to help make the telescopes and help pay for them.