Astronomers have discovered a strange-looking star with two completely different faces. And the star, which was called Janus, and it is derived from the name of a Roman god, is characterized by two faces:
- The first: from hydrogen
- The second: from helium.
The star is detailed in a new study led by astronomers at Caltech. "The star's surface changes completely from one side to the other, and when I show the observations to people they get amazed," said lead study author Ilaria Kayazo, a postdoctoral researcher at Caltech.
The star's odd nature could be due to the presence of a small magnetic field creating "inhomogeneities" in temperature or pressure on the surface. The data confirmed that Janus rotates on its axis every 14.97 minutes.
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