NASA's James Webb Telescope Discovers New Exoplanet Beta Pictoris d
#GS-3 #Science & Technology #Space #Exoplanets #James Webb Space Telescope
Why in News
- Using **NASA**'s **James Webb Space Telescope (JWST)**, scientists discovered a hidden giant planet named **Beta Pictoris d** inside the **Beta Pictoris** system, which sits **63 light-years from Earth** in the **Milky Way** galaxy.
About Beta Pictoris System
- **Beta Pictoris** is a very young star system of around **23 million years old**, which helps scientists understand how planets form near dust disks.
- Before this finding, researchers already knew about two large planets in this system, called **Beta Pictoris b** and **Beta Pictoris c**.
- Adding **Beta Pictoris d** makes this only the **second known planetary system** that has at least **three directly imaged planets**.
About Beta Pictoris d
- This planet is a **gas giant exoplanet** with a mass at least **twice the mass of Jupiter**, making it the smallest giant planet in its system.
- It orbits its parent star at a distance of **30 astronomical units (AU)**, which is similar to Neptune's distance from the Sun and gives it the widest orbit.
- The planet stayed hidden for years because it was buried inside a bright disk of space dust that blocked normal telescopes.
Discovery Method
- Astronomers found the planet by chance using the **Near-Infrared Spectrograph (NIRSpec)** instrument on the **JWST** while studying **Beta Pictoris b**, as light patterns revealed its movement and chemical signals.
- Scientists confirmed it as a planet through **carbon monoxide absorption lines**, and later used the **Mid-Infrared Instrument (MIRI)** to detect water vapor and methane in its atmosphere.
Significance
- This marks the **first directly imaged exoplanet discovered primarily through moderate-resolution spectroscopy**, opening a fresh way to find hidden worlds through atmospheric chemical fingerprints.