47 Ursae Majoris
47 Ursae Majoris Encyclopedic Information
Tucked away in the iconic constellation of Ursa Major, 47 Ursae Majoris—also known by its formal name Chalawan—is a stellar sibling to our own Sun that has captivated the astronomical community for decades. Located roughly 46 light-years away, this G-type main-sequence star is more than just a distant point of light; it represents a crucial benchmark in our search for other worlds. As a solar analog, it offers a mirror into the past and potential future of our own solar system, serving as a primary laboratory for exoplanetary research and the ongoing quest to find Earth-like conditions in the vast cosmic wilderness.
History & Significance
The discovery of 47 Ursae Majoris as a multi-planetary system was a watershed moment in the 1990s, marking one of the earliest detections of planets orbiting a sun-like star. First identified in 1996 by astronomers Geoffrey Marcy and R. Paul Butler, the system shattered the assumption that our solar system was a unique architectural anomaly. While the star itself lacks ancient mythological baggage compared to its brighter neighbors in the Big Dipper, it was officially named 'Chalawan' in 2014 by the International Astronomical Union, honoring a powerful crocodile king from Thai folklore. This naming transition bridged the gap between cold, numerical cataloging and the human desire to weave celestial bodies into our cultural tapestry.
Physical Structure
Physically, 47 Ursae Majoris is remarkably similar to our Sun, boasting a mass approximately 1.03 times that of the solar standard and a slightly higher metallicity, which suggests it is rich in the heavy elements necessary for building rocky planets. Its core is a high-pressure furnace of nuclear fusion, converting hydrogen into helium with a steady, reliable output that keeps the surrounding system bathed in a temperate glow. Unlike volatile, flare-prone red dwarfs, this star exhibits a stable magnetic environment, which is a vital prerequisite for the long-term habitability of any orbiting worlds found within its grasp.
✨ Cosmic Secrets & Fun Facts
- ✦ 47 Ursae Majoris resides approximately 13.8 light-years away. The photons capturing your eye today actually left the star 13.8 years ago!
- ✦ A star's color is a direct mathematical indicator of its surface temperature—blue stars are significantly hotter than red stars.
Related Celestial Bodies
Explore other significant celestial entities in the Ursa Major constellation and beyond.
Add StarryDex to your Home Screen
Tap Share, then Add to Home Screen. It opens full screen and works offline.