When the mysterious object known as ‘Oumuamua passed Earth in October of 2017, astronomers rejoiced. In addition to being the first interstellar object detected in our Solar System, but its arrival opened our eyes to how often such events take place. Since asteroids and comets are believed to be material left over from the formation of a planetary system, it also presented an opportunity to study extrasolar systems.
Unfortunately, ‘Oumuamua left our Solar System before any such studies could be conducted. Luckily, the detection of comet C/2019 Q4 (Borisov) this summer provided renewed opportunities to study material left by outgassing. Using data gathered by the William Herschel Telescope (WHT), an international team of astronomers found that 2I/Borisov contains cyanide. But as Douglas Adams would famously say, “Don’t Panic!”
Continue reading “Astronomers Find Cyanide Gas in Interstellar Object 2I/Borisov, but Don’t Panic Like it’s 1910”
It seems that comet 67P/Churyumov–Gerasimenko is not the stoic, unchanging Solar System traveller that it might seem to be. Scientists working through the vast warehouse of images from the Rosetta spacecraft have discovered there’s lots going on on 67P. Among the activity are collapsing cliffs and bouncing boulders.
Continue reading “Rosetta Saw Collapsing Cliffs and Other Changes on 67P During its Mission”
When ‘Oumuamua passed through our Solar System two years ago, it set off a flurry of excitement in the astronomical community. Here was the first-ever interstellar object that be observed by human trackers, and the mysteries surrounding its true nature and composition led to some pretty interesting theories. There were even some proposals for a rapid mission that would be able to rendezvous with it.
And now that a second interstellar object – C/2019 Q4 (Borisov) – has been detected traveling through the Solar System, similar proposals are being made. One of them comes from a group of scientists from the Initiative for Interstellar Studies (i4is) in the UK. In a recent study, they assess the technical feasibility of sending a mission to this interstellar comet using existing technology, and found that there were a few options!
Continue reading “Could We Intercept Interstellar Comet C/2019 Q4 Borisov?”
On August 30th, amateur astronomer Gennady Borisov spotted a comet of extrasolar origin passing through our Solar System. This is the second time in as many years that an interstellar object has been observed (the last being ‘Oumuamua 2.0 in 2017). Thanks to the Gemini Observatory, we now have pictures of this comet, making it the first object of its kind to be successfully imaged in multiple colors!
Continue reading “Images are Starting to Come in of the New Interstellar Comet”
In 2017, astronomers and the world were surprised to learn that an interstellar object (named ‘Oumuamua) passed by Earth on its way to the outer Solar System. After multiple surveys were conducted, scientists were left scratching their heads as to what this object was – which speculation ranging from it being a comet or an asteroid to comet fragment or even an extra-terrestrial solar sail!
But one of the greatest takeaways from that event was the discovery that such objects pass through our Solar System on a regular basis (and some stay). And as it turns out, astronomers with NASA, the ESA, and the International Scientific Optical Network (ISON) announced the detection of what could be a second interstellar object! Could this be ‘Oumuamua 2.0? And if so, what mysteries might it present?
Continue reading “Oumuamua 2.0? It Looks Like There’s a New Interstellar Object Passing Through the Solar System”
The European Space Agency’s (ESA) Rosetta mission spent two years at the comet 67P/Churyumov-Gerasimenko. At the end of September 2016, its mission was ended when the spacecraft was sent on a collision course into the comet. During its time at comet 67P, it captured a vast amount of images.
The ESA made all those images freely available at their Rosetta website, and now an astro-photographer working with those images has found something interesting: a chunk of ice travelling through space with 67P.
Continue reading “An Astrophotographer Noticed a Chunk of Ice Orbiting Comet 67P in Rosetta’s Photos”
The ESA has announced a new mission to explore a comet. The Comet Interceptor mission will have a spacecraft wait in space until a pristine comet approaches the inner Solar System. Then it will make a bee line for it, and do some ground-breaking science.
Continue reading “Meet the Comet Interceptor. It’ll Wait Patiently In Space for a Comet, Then Pounce On It”
The early days of the Solar System are hard to piece together from our vantage point, billions of years after it happened. Now a team of scientists have found a tiny chunk of an ancient comet inside an ancient meteorite. They say it sheds light on the early days of the Solar System when planets were still forming.
Continue reading “Astronomers Find a Chunk of a Comet Inside a Meteorite”
On October 19th, 2017, the Panoramic Survey Telescope and Rapid Response System-1 (Pan-STARRS-1) in Hawaii announced the first-ever detection of an interstellar object, named 1I/2017 U1 (aka. ‘Oumuamua). In the months that followed, multiple follow-up observations were conducted to learn more about this visitor, as well as resolve the dispute about whether it was a comet and an asteroid.
Rather than resolving the dispute, additional observations only deepened the mystery, even giving rise to suggestions that it might be an extra-terrestrial solar sail. For this reason, scientists are very interested in finding other examples of ‘Oumuamua-like objects. According to a recent study by a team of Harvard astrophysicists, it is possible that interstellar objects enter our system and end up falling into in our Sun somewhat regularly.
Continue reading “Interstellar Objects like Oumuamua Probably Crash into the Sun Every 30 Years or so and 2 Pass Within the Orbit of Mercury”
In 2014 , the European Space Agency’s (ESA) Rosetta spacecraft made history when it rendezvoused with Comet 67P/Churyumov-Gerasimenko. This mission would be the first of its kind, where a spacecraft intercepted a comet, followed it as it orbited the Sun, and deployed a lander to its surface. For the next two years, the orbiter would study this comet in the hopes of revealing things about the history of the Solar System.
In this time, Rosetta’s science team also directed the orbiter to look for signs of the comet’s bow shock – the boundary that forms around objects as a result of interaction with solar wind. Contrary to what they thought, a recent study has revealed that Rosetta managed to detect signs of a bow shock around the comet in its early stages. This constitutes the first time in history that the formation of a bow shock has been witnessed in our Solar System. Continue reading “Rosetta Flew Through the Bow Shock of Comet 67P Several Times During its Mission”