What produces the coronal gas?
What will be an ideal response?
1) Astronomers have evidence that most coronal gas is produced when massive stars die violently in supernova explosions. Although they are rare, such explosions blast large amounts of very hot gas outward in expanding bubbles. 2) Gas flowing away from very hot, young stars can also produce coronal gas. In some cases, neighboring bubbles of coronal gas may expand into each other and merge to form larger volumes called superbubbles.
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Which of the following was the most perfect region according to Aristotle's philosophy?
A) The center of the Sun B) The heavens C) Earth's surface D) Earth's center
Why do scientists use the scientific method?
What will be an ideal response?
Mars' axial tilt and spin are most similar to ________.
A. Venus's B. Mercury's C. the Moon's D. Earth's