An uncommon cosmic eruption is set to happen in the Milky Way galaxy soon, resembling the appearance of a “new” star in the night sky for a brief period.
Referred to as Nova, this event presents a unique sky-watching opportunity for individuals in the northern hemisphere. NASA states that such explosions occur infrequently in our galaxy.
This stellar eruption will take place in the T Coronae Borealis star system, situated 3,000 light-years away from Earth. This system consists of two stars, one being a deceased star, or “white dwarf,” orbiting near a red giant star that is nearing the end of its life cycle. According to NASA, our solar system’s sun will face a similar fate.
In systems like T Coronae Borealis, the proximity between the two stars causes material from the red giant to overflow onto the white dwarf’s surface over time. This leads to a buildup of pressure and heat, culminating in an eruption.
“The buildup of material on the white dwarf’s surface results in increased temperature and pressure until it eventually explodes. It’s a runaway reaction,” explained Bradley Schaefer, a retired physics and astronomy professor from Louisiana State University.
Schaefer likened a nova explosion to a hydrogen bomb detonating in space, creating a visible fireball from Earth’s perspective. (Not to be confused with a supernova, which occurs when a massive star collapses and dies.)
At the peak of the eruption, it should be visible to the naked eye, making it easy to observe from your backyard, Schaefer stated.
Astronomers anticipate the nova explosion happening between now and September. The last eruption from this system occurred in 1946, with the next expected eruption in about 80 years.
Astronomers worldwide are monitoring the North Star system for activity. If an eruption is detected, it could quickly reach a brightness similar to Polaris in less than 24 hours, offering a spectacular view. The explosion might remain visible to the naked eye for several days before fading.
According to NASA, skywatchers could potentially spot the eruption for around a week after dark using binoculars.
Typically too faint to be seen with the naked eye, T-corona systems can be identified by looking for the constellation or northern cap. This constellation forms a small semicircular arc between Hercules and Boes.
Schaefer, who extensively researched the T Coronae system, encourages catching a glimpse of this incredible phenomenon.
“This system has a recurrence time scale of less than 100 years, with most cycles lasting around 1,000 years,” he stated.
In a recent publication by the Astronomical History Journal, Schaefer unveiled two previous “long-lost” Ti Coronae Borealis eruptions from historical records, observed in 1217 by a German monk and in 1787 by English astronomer Francis Wollaston.
Schaefer shared a historical anecdote, recalling the monks near Augsburg, Germany, describing such an eruption as a significant yearly event, even naming it “signum mirabile,” which translates to ‘great omen’ in Latin. It was considered a favorable omen.
Yet, predicting the exact viewing period for this “wonderful omen” presents a challenge.
“This event could happen tonight,” Schaefer stated. “Most likely in the next few months, possibly by the end of summer.”
Source: www.nbcnews.com
