An enormous alien planet that some astronomers thought was dead and buried has come back to life, a new study suggests. A new analysis of observations from NASA's Hubble Space Telescope found that the bright nearby star Fomalhaut does indeed host a huge exoplanet, which scientists dubbed a "zombie" world in an aptly Halloween-themed video on the alien planet. This conclusion contradicts other recent studies, which determined that the so-called planet — known as Fomalhaut b — is actually just a giant dust cloud.