Recently, the night sky has become even more fascinating with the appearance of two bright novas. These stellar explosions, known as classical novas, are rare wonders that occurred shortly after each other. It’s believed this may be the first time in history that two of these events have been visible to the naked eye at once.
The first nova, called V462 Lupi, was spotted on June 12 in the Lupus constellation. It became more than 3 million times brighter than before. Then, just two weeks later on June 25, the second nova, V572 Velorum, appeared in the Vela constellation. Normally, astronomers see only one nova a year, making this double occurrence exceptional.
Stephen O’Meara, an expert in astronomy, remarked, “This is undoubtedly a rare event, if not historic.” He’s been researching old records but hasn’t found any instances of two novas appearing together before. The last notable occurrence was in 1936, when two novas appeared weeks apart but did not shine at their brightest simultaneously.
V462 Lupi peaked in brightness on June 20, reaching a magnitude of +5.5, while V572 Velorum was even brighter, peaking at +4.8 on June 27. To put this in perspective, a smaller magnitude means a brighter object; for example, the Moon has a magnitude of -12.7.
Photographer Eliot Herman captured images of these novas from his location in Chile. V572 Velorum glowed with a blue-white light, whereas V462 Lupi showed a purple hue. These novas will eventually fade, turning red as their light dims.
While both novas can be seen with the naked eye, a good telescope or stargazing binoculars can help, especially for those in the Northern Hemisphere. V462 Lupi is observable shortly after sunset along the southern horizon. In contrast, V572 Velorum is typically visible in more southern latitudes, including parts of Mexico and the southern U.S.
These novas are interesting phenomena. They occur in binary star systems where a white dwarf star pulls material from a larger companion. When enough material accumulates, an explosion happens, releasing a burst of light that can be seen from Earth. Unlike more powerful supernovas that can destroy stars, novas only affect the outer layers.
Some novas happen repeatedly. For example, T Coronae Borealis, the “Blaze Star,” lights up roughly every 80 years. However, predictions about its next appearance have proven challenging, as astronomers have anticipated its return for over a year now without success.
As for V462 Lupi and V572 Velorum, their future remains uncertain. We can only watch and see how these stunning stellar events fade over the coming weeks.