Ever since humanity has looked up in the sky, it has always wondered if there were worlds that were similar to Earth. This is the question that scientists have been struggling with for the past few decades.

For the most part, humanity has known that there are actually Earth-like exoplanets out there. But it still hasn't been determined if they actually support life.

Now a group of scientist are out to answer that question by actually taking more precise observations of the planets in question through the new Project Blue mission. So far, the most powerful telescopes in the world are still not able to take actual photographs of these planet, mainly due to their distance and the lack of light.

Thanks to the Kepler space telescope, scientists now know for a fact that there are Earth-like planets that exist in the habitable zone, an area that allows a planet to sustain liquid water.

However, the way that these telescopes prove they exist is merely through indirect detection. Scientists know they exist because they can see their footprints, to put it simply.

The way that exoplanets are currently detected is by observing how these planets affect their parent stars. A planet is detected if the host star dims at a regular interval, as the planet passes in front of it. The planet also slightly affects the star's relative position, by wobbling it slightly with its gravitational pull.

Aside from knowing that Earth-like planets do exist in several stars' habitable zones, there is still no way of knowing if there is in fact life within them. The newly launched Project Blue mission aims to solve this problem through the use of more sensitive equipment which will determine other factors that are currently unknown about these planets.

The Project Blue mission aims to determine these planet's atmosphere, composition, size, and other clues that should help scientist determine whether or not they harbor life. All of this is determined through fine-combing the light observed from the parent star and closely observing its light spectrums as the planet passes by.