The most massive star known in the universe is thought to be r136a1, which may be as much as 256 times the mass of our sun. what do r136a1 and our sun have in common?

The buildup of sediments where a river empties into a slow-moving or nonmoving body of water is known as a/an

What is the farthest destination to date for a human spaceflight mission?

Astudent poured a solution of bromothymol blue indicator into three test tubes. then he placed an aquatic plant in two of the test tubes, as shown below. he placed a stopper on each test tube and placed them all in the dark for 24 hours. bromothymol blue turns from blue to yellow in the presence of co2