Question

what is space science and rocket science​

Answer 1

$\huge\sf{\underline{Space \: science}}$

• Space science encompasses all of the scientific disciplines that involve space exploration and study natural phenomena and physical bodies occurring in outer space, such as space medicine and astrobiology.

$\huge\sf{\underline{Rocket \: science}}$

• The science of designing or building rockets also : something that is very difficult to learn or understand The job is challenging, but it's not exactly rocket science.

Answer 2

The intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.