As far back as 1912, astronomers realized that the Andromeda galaxy — then thought to be only a nebula — was headed our way. A century later, astronomers using NASA’s Hubble Space Telescope were able to measure the sideways motion of Andromeda and found it was so negligible that an eventual head-on collision with the … Read more
Located 2.5 million light-years away, the majestic Andromeda galaxy appears to the naked eye as a faint, spindle-shaped object roughly the angular size of the full Moon. What backyard observers don’t see is a swarm of nearly three dozen small satellite galaxies circling the Andromeda galaxy, like bees around a hive. These satellite galaxies represent … Read more
This is the largest photomosaic ever made by the Hubble Space Telescope. The target is the vast Andromeda galaxy that is only 2.5 million light-years from Earth, making it the nearest galaxy to our own Milky Way. Andromeda is seen almost edge-on, tilted by 77 degrees relative to Earth’s view. The galaxy is so large … Read more
In commemoration of Edwin Hubble’s discovery of a Cepheid variable class star, called V1, in the neighboring Andromeda galaxy 100 years ago, astronomers partnered with the American Association of Variable Star Observers (AAVSO) to study the star. AAVSO observers followed V1 for six months, producing a plot, or light curve, of the rhythmic rise and … Read more
Data from NASA’s retired Spitzer Space Telescope has given scientists new insights into why some supermassive black holes shine differently than others. In images from NASA’s retired Spitzer Space Telescope, streams of dust thousands of light-years long flow toward the supermassive black hole at the heart of the Andromeda galaxy. It turns out these streams … Read more
A long-exposure photograph of stars over the Hanle Dark Sky Reserve in Ladakh. | Photo Credit: Akash Anandh The temperatures were subzero and freezing. The conditions were unforgiving. We were elated and thrilled being outdoors all night. At 4,300 metres above sea level, we felt it could have been the Everest Base Camp. In reality, … Read more
The Milky Way at night sky in Hanle | Photo Credit: Akshay Satish A stunning view of the Milky Way in a 180 degree arc extending from the South to the North at the night sky in Hanle, Ladakh, India’s first dark sky reserve, is an unforgettable memory for a bunch of young students from Coimbatore. … Read more