Explain the key discoveries made by the James Webb Space Telescope (JWST) in advancing our understanding of the universe. Include details on how its technology differs from the Hubble Space Telescope and how this contributes to the study of exoplanets, star formation, and distant galaxies.

Specifically, elaborate on:

* **Key Discoveries:** Mention any significant findings related to early galaxy formation, exoplanet atmospheres, or star formation processes.
* **Technological Advancements:**  Compare JWST's mirror size, wavelength range, and orbit to Hubble's. Explain how these differences enable new observations.
* **Exoplanet Research:** How does JWST analyze exoplanet atmospheres and contribute to the search for habitable worlds?
* **Star Formation:** How has JWST provided new insights into the birth and evolution of stars?
* **Distant Galaxies:** How does JWST observe the earliest galaxies and what has it revealed about their formation and composition? 
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