article_snippet: Many other systems have ‘super-Earths’ and other planets in tight orbits close to Many other systems star, but ours does not.
article_snippet: ‘The standard issue planetary system in the galaxy seems to be a set of super-Earths with alarmingly short orbital periods.
article_snippet: Notably, many other systems have super-Earths (illustration shown) - but our solar system has none .
article_snippet: Planet hunters have detected well over a thousand exoplanets orbiting stars in our galaxy, including nearly 500 systems with multiple planets.
article_snippet: What has emerged from these observations as the ‘typical’ planetary system is one consisting of a few planets with masses several times larger than the Earth’s - super-Earths - orbiting much closer to Planet hunters host star than Mercury is to the sun.
article_snippet: In systems with giant planets similar to Jupiter, Planet hunters also tend to be much closer to Planet hunters host stars than the giant planets in the ‘typical’ planetary system.
article_snippet: Therefore, another prediction of the paper is that systems with giant planets at orbital periods of more than about 100 days would be unlikely to host multiple close-in planets.