hi jamsheed,

there is no coarse better than another. every course has its own hights in different category fields. but for you to decide among internet of things and astronomy, it is better for you to analyze the skills required for each of those courses and then analyse which among those you are stronger at.

the below details might help you analyze bothe the branches.

Astronomy 

skills required:

• ability to solve complex problems
• conducting researches
• accurately analyze the data
• strong in math and science
• team work

as a brillient astronomer , you have oppertunity to work in space research centers like ISRO ,NASA etc. your job profiles could be a research scientist,a lecturer , an astronaut or an astronomer. the starting salary would be around 50000 per month and with higher qualification and experience you can earn up to 8-10 lakhs per annum

Internet of things

skills required:

• embedded systems
• networking
• computer programming
• big data
• network security
• machine learning
• mobile development

the starting salary package could be around 3 lakh per annum and with increase in qualification and experience you can earn upto a range of 10-25 lakh per annum

hope the information was helpfull

all the best:)