. >> our telescope rachel was used as an optical tracking observatory. >> reporter: nasa astronaut scott kelly tweeting steph, so much respect for you, but regarding the moon landing thing, let's talk. dm me. after i asked nasa engineer popularly known as the mohawk guy what he thought, he tweeted back send him over. even curry tweeted a cool-looking smile emoji wearing sunglasses, along with a cnn article that nasa had offered to give him a tour of one of its lunar labs. astronomers here say nasa probably has more to show steph curry, but he's welcome to come here any time he likes and check out their moon rock and telescope. in oakland, melanie woodrow, abc 7 news. >>> a new report suggests that the homeless crisis in the bay area is worse than it seems. official figures put the homeless population in our region at 20,000, but analysts at the real estate website zillow say that number is 6,000 people short. while the government relies on visual counts every two years, zillow used algorithms to get its count. based on its estimates, san francisco's homeless population is undercounted by