The most common type of star in the universe, the M dwarf, seems to be lacking any Jupiter-sized exoplanets. Why is that?
Astronomers theorize that Jupiter-like planets might prevent smaller planets from forming in the same systems. If true, we should find lots of systems where there is either a Jupiter or a small planet. What does the data say?
A new study finds that Hot Jupiters have companion planets in the system at a higher rate than previously thought. This has big implications for the theories on how these fascinating planets, and their larger systems, form.
Who might be looking back at us?