JWST reveals WASP-121b: Hot Jupiter with two baffling helium tails.

• JWST discovered WASP-121b, a 'hot Jupiter' exoplanet, challenging scientific understanding.
• The planet, also called 'Tylos', has an extreme temperature of 4200°F (2300°C) and a 30-hour year.
• WASP-121b exhibits two massive helium tails, formed by atmospheric escape, observed in unprecedented detail.
• One tail trails the planet, while the other mysteriously leads it, baffling scientists and current models.
• The tails are exceptionally long, extending 100 times the planet's width and three times the star-planet distance.

Why It Matters: WASP-121b's two helium tails challenge existing exoplanet atmospheric escape models.