What do the elliptical orbits of the planets look like?

Earth’s elliptical orbit is almost a perfect circle, but all planets have an elliptical orbit that is in a circular motion (more oval the further out they are).

Six amino acids have side chains that are polar but not charged. these are serine (ser), threonine (thr), cysteine (cys), asparagine (asn), glutamine (gln), and tyrosine (tyr). these amino acids are usually found at the surface of proteins, as discussed in the proteins 2 module.