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What is an Einstein Cross? Fifth image in rare cosmic formation points fingers at a ...

What is an Einstein Cross? Foreground galaxies warp space-time and bend the light from a distant galaxy to create four ...
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Asteroid that orbits alongside Earth discovered: What are quasi-satellites

Astronomers have identified a new quasi-satellite, asteroid 2025 PN7. This Arjuna class asteroid orbits similarly to Earth, enhancing our understanding of planetary dynamics.