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LS1: The Invisible Star Paradox | Gravitational Lensing Discovery

This 14,000°C blue supergiant should be one of the brightest objects in the sky, but it was completely invisible to every telescope on Earth. Here's how scientists finally found it.

🔭 THE DISCOVERY
LS1 remained hidden until astronomers used gravitational lensing—a technique Einstein predicted in 1915. By using a distant galaxy's gravity to bend light around spacetime, they turned an entire galaxy into a cosmic telescope.

⭐ THE STAR
• B-type blue supergiant
• Surface temperature: 14,000°C (25,000°F)
• Over 2X hotter than our Sun
• Discovered using gravitational lensing
• Located beyond the reach of conventional telescopes

🌌 THE SCIENCE
Gravitational lensing occurs when a massive object (like a galaxy) bends spacetime, magnifying light from objects behind it. This cosmic magnifying glass effect revealed LS1—a star that would otherwise be impossible to detect.

Einstein's Theory of General Relativity predicted this phenomenon over 100 years ago. The LS1 discovery proves his predictions about using gravity as a telescope were correct.

🔬 WHAT IS GRAVITATIONAL LENSING?
When light passes near a massive object, gravity bends its path. This creates a lens effect, magnifying distant objects. Astronomers use this natural phenomenon to discover stars, galaxies, and even exoplanets that are too far away to see directly.

📚 LEARN MORE
• Gravitational lensing technique
• Einstein's General Relativity predictions
• B-type supergiant stars
• How astronomers discover distant stars
• Cosmic telescope methods

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