they knew because they had a calendar to help them out and keep date
Aryabhata died in 550 AD but I don't know how. Plus no one knows where.
Aryabhata was great mathematician-astronomers who wrote books about mathematics and astronomy. His most well know works include Aryabhatiya, and Arya-siddhanta.
I don't know the solar radius, but all I know is the radius and that is 25.7 R. you. :)
Solar Panels know when the sun is out when it feels the warmth and it starts producing energy.
I am not that sure on what it can do but i do know that solar fuel comes from the solar system akasun!!! But you can get a solar light for a garden and a solar calculator .Which their energy comes from the sun!!!
they would like to know about solar eclipse
TV
We do not know. Although we have detected planets in other solar systems, we do not know what colors they are.
The flow of charged particles from the sun is known as the Solar Wind. But since it is composed of charged particles in a vacuum, it is quite different from the atmospheric winds we know.
Because it is within the limits of our solar system
solar buses are good since.............i really don't know
Currently, our solar system is the only one we know of to contain life.THERE IS ONLY ONE SOLAR SYSTEM.