Arp 4 is a galactic duo immortalized by the Hubble Space Telescope. In the image, a small bright spiral appears to be orbiting around a larger, darker companion. However, this apparent proximity ...

Look up this week: Planetary alignment with six planets visible just after dusk.

From the 2026 Winter Olympics and India–Brazil ties to International Mother Language Day and a rare planetary alignment — test your preparation with this quick UPSC-focused quiz ...