Because spacetime is not actually a fabric, nor is it a solid or liquid or gas that friction can be created with.
Stars.
Yes, all spherical planetary bodies have an axis
He made a powerful telescope
A system of celestial bodies grouped around a sun.
For the same reasons they do so on earth. To pinpoint locations.
Astronomy or Planetary Science
On the earth (and planetary/stellar bodies) they are called latitudes and longitudes.
They are both round, they both orbit something, and they are both planetary bodies.
No, it is not true. They do hit planets sometimes.
static friction is the friction between two bodies they are in contact. And another sliding over the other. Kinetic friction is the friction between two bodies they are rolling .And that force is opposite to the rolling angle
Friction opposes motion or, more correctly, relative motion between two bodies in contact.Motion.
The bodies of planes and boats are streamlined so that they experience minimum amount of friction while moving through air and water, respectively.