Sometimes, things across the vast Universe line up just right for us. The Einstein Ring above, like all Einstein Rings, has three parts. In the foreground is a distant massive object like a galaxy or galaxy cluster. In the background, at an even greater distance away, is a star or another galaxy. We’re the observers, … Read more
Look closely. Can you spot the ring of light around the center of this galaxy, NGC 6505? ESA’s Euclid telescope captured galaxy NGC 6505, which is acting as a gravitational lens, bending the light from a more distant galaxy and creating this Einstein ring. See closeup below. Image via ESA/ Euclid/ Euclid Consortium/ NASA. Image … Read more
The Euclid space telescope has, by chance, discovered its first Einstein ring, and it is absolutely stunning. Beyond its aesthetic appeal, this perfectly circular Einstein ring has allowed researchers to “weigh” the dark matter at the heart of a galaxy almost 600 million light-years away. The European Space Agency (ESA) spacecraft, which launched in July … Read more
For better or for worse, a small part of the Apollo 11 spacecraft will now be Jon Mesick’s to have and to hold for all the days of his life. The strip of golden thermal polyimide tape, which made the trip to the moon with the first astronauts to land there in 1969, is now … Read more
Every year, you can ring in the new year by going out at midnight and finding the dazzling star Sirius, sometimes called the New Year’s Star. In 2025, Sirius will be joined by the bright planets Jupiter and Mars. And of course, the bright constellation Orion the Hunter makes them easy to find. You can’t … Read more