What's in the Night Sky This March?

March is shaping up to be an exciting month for stargazers and space enthusiasts. The first two weeks of the month offer a rare opportunity to spot four bright planets in the evening sky, while astronomers are making progress in understanding the mysteries of asteroids and capturing stunning images of a rare interstellar comet.

For those interested in planetary sightings, the evening sky will be lit up by the presence of Venus, Mercury, Mars, and Jupiter. According to Steven Robinson Pictures via Getty Images, the best time to spot these planets is during the first two weeks of March, when they will be visible low in the west. Mercury, in particular, will be at its best evening apparition of the year for Northern Hemisphere observers during this time.

Meanwhile, SpaceX is continuing its efforts to launch more Starlink satellites into orbit. On March 1, the company successfully deployed two more groups of Starlink satellites from opposite coasts, with a Falcon 9 mission launching from Vandenberg Space Force Base in California and another from Cape Canaveral Space Force Station in Florida. These launches bring the total number of Starlink satellites in orbit to over 2,000, as SpaceX works towards its goal of providing global internet connectivity.

In other news, astronomers are making progress in understanding the mysteries of asteroids. A new paper published by Justin Atchison of the Johns Hopkins University Applied Physics Laboratory proposes a method for estimating the mass of potentially hazardous asteroids (PHAs). This method involves using the change in velocity of a spacecraft as it approaches the asteroid to calculate its mass. While this method is still in its early stages, it has the potential to provide valuable insights into the composition and size of these celestial bodies.

The study of asteroids is crucial for understanding the formation and evolution of our solar system. By studying the mass and composition of asteroids, scientists can gain insights into the early days of our solar system and the processes that shaped the planets.

In addition to asteroids, astronomers are also studying the ancient stars that lit up the early Milky Way. A new study has identified a large collection of RR Lyrae variable stars, which are ancient, pulsating stars that swell and shrink over the course of just a few hours. These stars are important for understanding the formation and evolution of our galaxy, as they provide a window into the past.

Finally, a stunning image of the interstellar comet 3I/ATLAS has been captured by the JANUS science camera aboard the European Space Agency's Jupiter Icy Moons Explorer (JUICE) spacecraft. This comet is only the third known interstellar object to have been detected passing through our solar system, and its image provides a rare glimpse into the composition and structure of these mysterious objects.

As the month of March progresses, stargazers and space enthusiasts can look forward to a range of exciting celestial events and discoveries. Whether it's spotting planets in the evening sky, learning about the latest advances in asteroid research, or marveling at the beauty of interstellar comets, there's something for everyone to enjoy.