What are some of the challenges and limitations of astronomical research?

Sep 19, 2024 ... ... Planet. For 57 days this fall, Earth will have a second moon. An asteroid is expected to make a “horseshoe path” around Earth over the next ... ... stars and signals a significant step closer to finding a world similar to Earth. NASA / Ames / JPL-Caltech / T. Pyl. Most NASA images are in the public ... Apr 25, 2007 ... Researchers detected the planet orbiting one of Earth's nearest stars, a cool red dwarf called Gliese 581, 20 light years away in the constellation of Libra. May 29, 2014 ... Scientists discover the first Earth-sized planet in its star's habitable zone. ... Over centuries, the planet second closest to the sun was known ... ... Earth exoplanet around Barnard's Star, possibly making it the second closest exoplanet to our Solar System. Barnard's Star is the closest single star system ... Nov 14, 2018 ... Barnard's star b is the second closest known exoplanet to our Sun. The closest lies just over four light-years from Earth and was also ... Oct 2, 2024 ... At least five times further from Earth than our true moon at its closest ... 4.5 billion years ago, another planet crashed into Earth. We ... Sep 18, 2024 ... “Earth can regularly capture asteroids from the Near-Earth object (NEO) population and pull them into orbit, making them mini-moons,” ... Sep 27, 2024 ... Starting Sept. 29, the Earth will have a temporary second “mini moon.” A new asteroid, named 2024 PT5, is set to briefly orbit the planet ... Nov 7, 2023 ... This is the second-closest globular cluster to Earth, they are collections of hundreds of thousands of stars held together by gravity.