But the method favours the detection of large planets orbiting close to its parent star.
But if the planet's orbit is nearly edge-on, as viewed from Earth, then the planet will transit its parent star.
Its parent star is similar to the sun, again unlike those of the other two candidates, both of which orbit cooler, dimmer stars.
It senses the presence of planets by looking for a tiny "shadowing" effect when one of them passes in front of its parent star.
BBC: Kepler telescope spies 'most Earth-like' worlds to date
This discovery more closely resembles other exoplanets found to date, except KELT-2Ab's parent star is so bright it can be seen from Earth through binoculars.
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Under one, small dust grains circling around a parent star collide, get larger and larger, and under the force of gravity develop into a much larger object.
Under one scenario, small dust grains circling around a parent star collide, get larger and larger, and under the force of gravity develop into much larger objects.
The conclusion: The tiny bright blob was an object still embedded in the disk of material around the parent star, suggesting a planet in the earliest stages of coming into being.
Ian Roxburgh, professor of astronomy at Queen Mary, University of London, said the transit method still favoured the detection of big planets, because they blocked out more light from the parent star.
Trappist (TRAnsiting Planets and PlanetesImals Small Telescope) will study exoplanets by measuring at high precision the "brightness dips" that can be caused by objects transiting (passing in front of) their parent star.
The most basic of the indexes rates a world's suitability for life based on its place within a habitable zone, which is calculated by a planet's distance from its parent star, the star's luminosity and temperature.
But with future telescopes, scientists say it may be possible to see past the blinding glare of the parent star to pick out just the faint light passing through a small world's atmosphere or even reflected off its surface.
BBC: Kepler telescope spies 'most Earth-like' worlds to date
In their paper, the co-authors argue that gravitational tidal heating caused by the gravitational friction of an earth-like exo-moon on an eccentric orbit around a Jupiter-like planet lying at a Jupiter-like distance from its parent star, could, in fact, create habitable conditions.
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But some theorists believe that when it is possible, they will be able to determine how a particular object formed by comparing its spectrum with that of its parent star to determine the relative proportions of heavy elements in the two bodies.
One way they could have got there is if multiple planets have interacted in a gravitational "billiards game", in which one planet might have been flung in towards the parent star (sometimes to be swallowed whole), while another might have been thrown into an eccentric orbit, or perhaps even ejected from the system altogether.
Besides that magazine, some of those photos also were published in the Irish Daily Star newspaper and Chi, which according to its parent company Mondadori is a women's magazine with an average circulation of more than 218, 000 and a readership well beyond that.
"Star Wars: The Clone Wars" is an animated show from Lucasfilm and Cartoon Network (whose parent company, Time Warner, also owns CNN).
Several monster planets have been discovered by looking for the wobbles in a star's spectrum caused by a planet's to-and-fro tugging of its parent.
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