I'm not sure about (a), but it would probably be very difficult to land it with the thrusters on the probe. Philae almost bounced off the comet and it was desig

I'm not sure about (a), but it would probably be very difficult to land it with the thrusters on the probe. Philae almost bounced off the comet and it was designed for that purpose... For the second one, seems that https://twitter.com/AstroKatie/status/781814758404005888 https://twitter.com/AstroKatie/status/781814758404005888 has the response (with not a lot of details).