The researchers have also reported the detection of an unconfirmed signal from the multiplanet system which could potentially be "a third super-Earth in a more temperate orbit". Most exoplanets are discovered by monitoring stars for a small dip in luminance caused by planets passing in front of them.
The star is a red dwarf, and the planets may lie within the star's habitable zone.
The dwarf star that these exoplanets were detected orbiting, is half the size of the Sun in terms of mass and even though it is the brightest red dwarf star in our sky, it is a lot dimmer.
The research, which was published in Science, holds a lot of promise, but we don't yet possess the technology to view these Earth-alikes in greater detail.
The astronomers observed the red dwarf using HARPS (High Accuracy Radial velocity Planet Searcher) spectrograph the European Southern Observatory in Chile.
Fellow USQ researcher and study co-author Professor Rob Wittenmyer said the star was also very stable.
GJ 887b, meanwhile, is much closer to the star, with an orbital period of 9.3 days.
The team estimates the surface temperature of the outer planet (Gliese 887c) to be around 70 degrees celsius.
Astronomers have found two super-Earth planets orbiting a nearby red dwarf, Gliese 887 (GJ 887) close to its habitable zone.
"If Lacaille 9352 was as active as our Sun, it is likely that a strong stellar wind - outflowing material which can erode a planet's atmosphere - would simply sweep away the planets' atmospheres".
Are there other exoplanets in space similar to Earth that can support life?
So, the newly discovered planets could possibly have retained their atmospheres, or have thicker atmospheres than the Earth indicating that they could potentially host life.
The other interesting feature the team discovered is that the brightness of GJ 887 is nearly constant.
Another thing that the researchers found is that Gliese 887's brightness is quite constant, which would make future studies of the super-Earths' atmospheres much easier. The third planet takes 50 days to orbit the star. Their proximity offers a promising opportunity to study exoplanet atmospheres using the soon to be launched James Webb Space Telescope.
Dr Sandra Jeffers, from the University of Göttingen and lead author of the study, says: "These planets will provide the best possibilities for more detailed studies, including the search for life outside our Solar System". In the end, they generated a visualization analogous to a time-lapse movie, which revealed that the Gliese 887 was jiggling. One of them is based on how distant worlds block out some light from their stars when they pass in front of their stars - from the perspective of the observer.