What is the empirical formula for ba*2 and o-2

How do scientists think that gravity affected the formation of our solar system?

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

  the mississippians were considered to be  horticulturalists, which means they were