The first exoplanet discovered by NASA is closely similar to the most recent discovery. Here are the small differences

07/03/2022
Credit image: NASA exoplanets - HD 114762 b
Credit image: NASA exoplanets - HD 114762 b

Article by: Andacs Robert Eugen, on 07 March 2022, at 05:14 am Los Angeles time

Recently, NASA discovered a new exoplanet, which is quite similar to the first exoplanet from several perspectives, but there are also differences between them. 

The first exoplanet was discovered by NASA in 1989 and named HD 114762 b orbiting the HD 114762 (G-type star). HD 114762 b is 131 light-years from Earth. This exoplanet is closer to its star than Earth to the Sun. Our planet is approx. 1 AU from the Sun, while this exoplanet is only 0.36 AU from the orbiting star. 

The first exoplanet discovered by NASA is a gas giant, with a mass about 10.69 times more than Jupiter and a radius of 1.11 times larger than that of the largest planet in the Solar System, Jupiter. 

NASA also claims that the orbital period of the exoplanet is 83.9 days. 

The US space agency said that the method to discover this exoplanet was the Radial Velocity method. You can see a simulation of the first exoplanet discovered by NASA in the image above. 

Credit image: NASA exoplanets - HD 29399 b
Credit image: NASA exoplanets - HD 29399 b

Speaking of the last exoplanet discovered by the space agency, a gas giant called HD 29399 b, we can say that it is quite similar to the first exoplanet discovered. At first glance, we will say that the approximate color of the planet according to NASA is similar between them, especially the color red. 

However, exoplanets are not only classified according to a certain color they may have. They are also classified according to their size, how they were discovered, their structure, surface, and many others that are difficult to be the same. 

The new exoplanet discovered by NASA has a radius of 1.21 times that of Jupiter (obs: this is a NASA estimate). It also has a mass 1.57 times larger than Jupiter. Also, HD 29399 b was discovered by Radial Velocity, being at a distance of 144 light-years from us.

A big difference between the two exoplanets is the orbital period and the distance from the star they orbit. The new exoplanet has an orbital period of 2.4 years and is at a distance from its star, almost twice as long as the Sun-Earth distance. HD 29399 b is at a distance of 1,913 AU from its star, HD 29399.

Here is the difference between them:


Exoplanet              Radius                     Mass                    Orbital radius               Orbital period

     


HD 114762 b       1.11 x Jupiter             10.69 x Jupiters             0.36 AU                    83.9 days


HD 29399 b        1.21 x Jupiter             1.57 x Jupiters               1.913 AU                    2.4 years


So, if we look at the two exoplanets, we can see that they are quite similar. But if we look at all the data, we will see that they are not so similar.

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