Super – the moon’s orbit is elliptical and has an average distance of 350,000km from Earth. It can vary by approximately 50,000km between the perihelion (minimum distance away) and aphelion (maximum distance away). In January, the moon appeared bigger as it was closer to the Earth.
A blue moon. The lunar orbit is less than a calendar month so on rare occasions there are two full moons in a month. That happened in January. It is not that rare, actually, and happens about once every 2.7 years.
A blood moon is a new term used to describe a lunar eclipse. This is when the moon is in the Earth’s shadow. The yellow/ red colour is due to scattered yellow and orange light from the sun.
In January 2018, all these things happened at the same time, which is a once-in-a-lifetime occurrence.