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Astronomers spot only the 2nd interstellar object ever seen

An amateur astronomer discovers an interstellar comet on its way to our Sun.

Comet C/2019 Q4's trajectory.

Credit: NASA/JPL-Caltech
  • The comet C/2019 Q4 (Borisov) was spotted by an amateur astronomer.
  • The object is moving so fast, it likely originated outside our solar system.
  • The comet should be observable for another year.


A comet that may be coming from outside our solar system has been discovered. If confirmed, this would be second interstellar object ever identified, with the first one being 'Oumuamua, found in 2017.

The new comet, dubbed C/2019 Q4 (Borisov), was discovered by the Ukrainian amateur astronomer Gennady Borisov at the MARGO observatory in Nauchnij, Crimea on August 30th, 2019. Since the find, the origins of the unusual space rock, which doesn't seem to have a circular or elliptical orbit, have been debated by the astronomers.

The object's so-called eccentricity, one of its key orbital parameters, has been measured by the Minor Planet Center to be more than three, which means it has an arc-shaped trajectory.

Gemini Observatory two-color composite image of C/2019 Q4 (Borisov). Blue and red dashes show background stars which seem to streak due to the motion of the comet.

Composite image by Travis Rector. Credit: Gemini Observatory/NSF/AURA

One other eye-popping indicator that serves as the clue to the comet's interstellar origins is its high velocity of about 93,000 miles per hour (or 150,000 kph). That's too fast to be pulled in by the sun's gravity and also means that the object is probably just passing through.

Davide Farnocchia of NASA's Center for Near-Earth Object Studies at JPL says the velocity is significantly above other objects that orbit the Sun this far away. "The high velocity indicates not only that the object likely originated from outside our solar system, but also that it will leave and head back to interstellar space," pointed out Farnocchia.

Borisov's comet is not likely to come close to Earth, currently about 260 million miles away from our Sun. At its closest point to Earth (or perihelion), it's still projected to stay as far as 190 million miles, farther than the orbit of Mars.

How do we know this is even a comet? From the coma – its fuzzy looks, which are indicative of the object having a central icy body with a cloud of dust and particles surrounding it on approach to the Sun, which is heating it up, reports NASA's press release. The nucleus of the comet is estimated to be between 1.2 and 10 miles (2 and 16 kilometers) in diameter.

For about another year, you too can take a peek at the unusual space body if you have a professional telescope. "The object will peak in brightness in mid-December and continue to be observable with moderate-size telescopes until April 2020," explained Farnocchia. "After that, it will only be observable with larger professional telescopes through October 2020."

Neom, Saudi Arabia's $500 billion megacity, reaches its next phase

Construction of the $500 billion dollar tech city-state of the future is moving ahead.

Credit: Neom
Technology & Innovation
  • The futuristic megacity Neom is being built in Saudi Arabia.
  • The city will be fully automated, leading in health, education and quality of life.
  • It will feature an artificial moon, cloud seeding, robotic gladiators and flying taxis.
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Why do people believe in conspiracy theories?

Are we genetically inclined for superstition or just fearful of the truth?

Videos
  • From secret societies to faked moon landings, one thing that humanity seems to have an endless supply of is conspiracy theories. In this compilation, physicist Michio Kaku, science communicator Bill Nye, psychologist Sarah Rose Cavanagh, skeptic Michael Shermer, and actor and playwright John Cameron Mitchell consider the nature of truth and why some groups believe the things they do.
  • "I think there's a gene for superstition, a gene for hearsay, a gene for magic, a gene for magical thinking," argues Kaku. The theoretical physicist says that science goes against "natural thinking," and that the superstition gene persists because, one out of ten times, it actually worked and saved us.
  • Other theories shared include the idea of cognitive dissonance, the dangerous power of fear to inhibit critical thinking, and Hollywood's romanticization of conspiracies. Because conspiracy theories are so diverse and multifaceted, combating them has not been an easy task for science.

COVID-19 brain study to explore long-term effects of the virus

A growing body of research suggests COVID-19 can cause serious neurological problems.

Brain images of a patient with acute demyelinating encephalomyelitis.

Coronavirus
  • The new study seeks to track the health of 50,000 people who have tested positive for COVID-19.
  • The study aims to explore whether the disease causes cognitive impairment and other conditions.
  • Recent research suggests that COVID-19 can, directly or indirectly, cause brain dysfunction, strokes, nerve damage and other neurological problems.
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Better reskilling can future-proof jobs in the age of automation. Enter SkillUp's new coalition.

Coronavirus layoffs are a glimpse into our automated future. We need to build better education opportunities now so Americans can find work in the economy of tomorrow.

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