Question 1
When viewed through an optical telescope, planetary nebula ________.
◦ look like giant planets such as Jupiter
◦ still have planets orbiting the cloud
◦ have visible planets within their cloud of debris
◦ show the explosive form of the dead sun
◦ are spherical in form and often have "rings" like Saturn
Question 2
Which color stars have the highest surface temperature?
◦ red
◦ orange
◦ yellow
◦ blue