Look due south at about midnight. The brightest star in the sky is Arcturus. It’s bright orange tint is unmistakable.
To find it at other times of the night, just follow the handle of the Plough.

Once you have Arcturus, turn ninety degrees to your left. The dazzling bright blue star is Vega. These two stars could hardly be more different. Even just a casual look reveals how different they are. In the picture below, Arcturus is on the left and Vega is on the right.

Arcturus is roughly the same mass as the sun. But as it is near the end of its life, it has expanded to a bloated red giant. Much as our sun will do in a few billion years time.
Vega is a much younger star, but also much more massive. It’s burning through it’s nuclear fuel at an enormous rate and shining far hotter and brighter as a result. Because of the precession of the earth’s axis, Vega has been the northern pole star in the past, and will be again one day.
https://en.wikipedia.org/wiki/Arcturus
https://en.wikipedia.org/wiki/Vega
These beautiful jewels in the sky will be there on any clear night for the next few months.
