The first exoplanet ever confirmed in 1995 turned out to be what researchers now describe as a “hot Jupiter,” a giant world similar in mass to Jupiter but orbiting its star in only a few days. Scientists now think these planets originally formed…

The first exoplanet ever confirmed in 1995 turned out to be what researchers now describe as a “hot Jupiter,” a giant world similar in mass to Jupiter but orbiting its star in only a few days. Scientists now think these planets originally formed…