That's a satellite.
flyby A+
a spacecraft is anything from satellites to shuttles.
The Russian vehicle Luna 2 was the first spacecraft to land on the moon.
it cant get very close
No, it is not possible for a spacecraft to land on the sun due to its extremely high temperatures and intense radiation.
Mars
No. Mankind not any spacecraft made it to Mars until 1971.
It can and is.
the speed of a comet and the rotation is far too fast for a spacecraft to land
spacecraft can land on Venus but they melt, it's 400oC,, probes have been sent there but they were destroyed by the heat after a while
flyby A+
Expendable.