You may say it's a diamond planet eight times larger than our Earth at a distance of 40 light-years from Earth. One-third of it consists of diamonds. It completes Earth's 365-day cycle in 18 hours, and its surface temperature rises to 3900 degrees Celsius.
Scientists say; the James Webb telescope, a space telescope, will observe 55 Cancri E and LHS 3844 B without air outside our solar system.
The James Webb Telescope space will observe two warmer 'super-Earth' planets, one of which once had lava seas.
NASA has announced that research published this summer will focus on two rocky planets: the lava-covered 55 Cancri E and the airless LHS 3844B.
Orbiting 1.5 million miles (2.4 million kilometres) away from its sun in space, 55 Cancri E has a year of only 18 hours. One side of this planet always faces its sun, called a 'tidal lock'. From this, it can be concluded that the planet's temperature should be relatively uniform.
Regardless, in 55 Cancri E, this does not seem to be the case since the hottest part of the world is in the opposing direction to the part facing the sun.
One explanation may be that there is a dynamic atmosphere in this strange world that transmits heat.
Reynoso of NASA's Jet Propulsion Laboratory in Southern California explains: If there is an atmosphere in it, [the web] has the sensitivity and wavelength to determine what the atmosphere is made of.
Another suggestion is the 55 Cancri E Tidally Lock (as the Moon is locked to the Earth, and its only side is always in front of it). Instead, it may act like Mercury, which rotates three times on its axis every two cycles around the sun, thus transmitting temperatures.
Alexis Brandeker, a researcher at Stockholm University, explains: 'This may explain why the warmest part of the planet is on the other side. Like the Earth, it takes time for the surface to warm up. The hottest time of the day would be in the afternoon, not at noon.
Scientists plan to measure the temperature at four different orbits on 55 Cancri E with the hope that the surface will heat up, melt and possibly evaporate during the day, causing a fragile atmosphere that the web telescope can detect.
In the evening, the vapour cools and thickens to form lava droplets that fall back to the surface and solidify again at night.
The other planet, LHS 3844B, does not have such a temperature due to its relatively small size. But it will allow scientists to analyze solid rock on another planet, as it is unlikely to have a thick atmosphere.
Laura Kreidberg of the Max Planck Institute for Astronomy in Heidelberg, Germany, explains: "Different types of rocks have different spectra. You can see with your own eyes that the colour of granite is lighter than basalt. The infrared rays emitted from the rocks are similarly different.
The team will record the thermal emission spectrum on the day of LHS 3844B and then compare it with the spectra of known rocks such as basalt and granite to determine their composition.
These observations will help scientists to understand what the Earth was like in the beginning and find new information in the search for another world.
How many exoplanets are outside our solar system?
Exoplanets are planets orbiting other stars outside our solar system. As of July 2015, NASA has discovered 2,000 such planets.
More than 5,000 exoplanets (planets outside our solar system) have been discovered in our galaxy, and scientists believe there may be hundreds of billions of exoplanets in total. Life may exist on some of these billions.