shape articles
What does it mean for an orbit to be elliptical?
What is the shape of the planetary nebula?
How do nebulae get their shape?
Why do many planetary nebulae appear spherical?
What is the actual shape of our universe?
Which galaxy is disk-shaped?
Can elliptical galaxies be spherical?
What makes galaxies different shapes?
What is the basic shape of an elliptical galaxy?
Are elliptical galaxies disc-shaped?
Why do planetary nebulas have so many different shapes?
