Media reported that each of the three planets in the Kepler 51 galaxy is covered in fluff. These planets are only a few times larger than Earth and have a radius larger than Neptune. Because of these extreme variables, the three Kepler 51 planets studied are now part of a relatively new planetary category, super-puff.
To find the information they wanted, the researchers recorded the days of Kepler 51b and 51d planets using the third-generation wide-area camera (WFC3) on the Hubble Space Telescope. Using this information, along with the latest updates on stellar parameters and reanalyzed Kepler data, scientists found that the density of the three giant planets was very low. The results showed that the density of the three planets studied in the Kepler 51 galaxy was less than 0.1 g/cm3.
The three planets are called Kepler 51b, 51c and 51d. These Jupiter-sized planets orbit Kepler 51 for 45, 85 and 130 days, respectively. Because of the relatively low light of the nearby sun, it is difficult to determine the mass of each planet by the instruments currently available and Doppler technology alone. To do this, the scientists used the Kepler light curve.
However, data collected in the past and recent studies have determined that the three Kepler 51 planets are not only low-density, but still have the lowest density on record.
To some’s disappointment, however, these planets are not necessarily as colored as marshmallows. Because the distance is too far, the current tool cannot detect their color. Therefore, they can or may not be bright colors.