The Mental Floss Guide to the November Night Sky

November is a great month for skywatching with two dazzling meteor showers, the rare view of a tiny planet, and an eerie celestial meeting of two bright worlds. None require telescopes or sophisticated knowledge of the sky above. If you have eyes, live on Earth, and want a good dose of the cosmos, you're in for a treat. Here are a few highlights that skywatchers should be on the lookout for.

NOVEMBER 4: FIREBALL SEASON BEGINS

The Taurid meteor shower dominates the early part of November, with the northern and southern hemispheres each getting their own shows. The South Taurids peak after midnight on November 4. The North Taurids peak at the same time, but on different days: the 10th going into the 11th. The source of the Taurids is the debris field of the comet Encke. The meteor stream is massive and spread out, with the gravitational influence of Jupiter, most notably, causing a split and thus the dual peaks.

Meteors, though appearing to be massive chunks of rock coursing toward Earth, are generally dust- or sand-sized particles that burn brightly as they slam into the atmosphere. The Taurids tend to be a bit larger than most, frequently producing what are called "fireballs" (really bright meteors). While you won't see many Taurid meteors per hour (around seven or so at best), what the shower lacks in quantity it makes up for in quality. If you have low levels of light pollution and your eyes are adjusted to darkness, you should be in for quite a show.

NOVEMBER 13: THE JV TEAM DEBUTS

On November 13, Venus and Jupiter will appear alarmingly close in the pre-dawn sky, practically as a single object, separated by a mere 0.3 degrees. But don't worry, the planets aren't colliding. Rather, it's a trick of perspective. Venus is about the size of Earth (it is, in many ways, our evil twin), and is one planet closer to the Sun than Earth in its orbit. It is a stunning, unblinking dot in the sky. Jupiter, meanwhile, is about five times farther from the Sun than is the Earth, but what it lacks in distance, it makes up for in size: you could fit about 1300 Earths inside of it. What makes their conjunction so fun is that you don't have to know much about space or astronomy to see the magic of orbital mechanics. How to see it: One hour before sunrise, look east. The two bright, eerily adjacent worlds will appear on the horizon. As the sun rises over the next hour, it will wash them out, so have coffee with you and enjoy the moment.

NOVEMBER 17: THE BEST METEOR SHOWER OF THE YEAR PEAKS

After midnight on November 17, the Leonids meteor shower will peak, and here is why you need to see it. 1. It coincides with a new moon, which means there will be no moonlight to wash out the sky. 2. This shower has a history of delivering the goods, some years bringing as many as 1000 meteors per minute. Note: This is not one of those years! Expect between 10 and 20 per hour, which still isn't bad when the sky is inky black, a celestial canvas waiting for brushes of light. (Incidentally, while the Taurid meteors collide with Earth's atmosphere at a snail's pace—a mere 65,000 miles per hour—the Leonids do not play around. They're smashing into us at a blistering 160,000 miles per hour.) 3. The 17th is a Friday and you can sleep late the next morning, so what are you going to do: Binge-watch somebody else's adventure on Netflix, or go live your own?

NOVEMBER 24: MERCURY SHINES AT ITS BIGGEST AND BRIGHTEST

Mercury will reach greatest eastern elongation, meaning it will be as far from the Sun as it can get for the rest of the year, relative to the Earth, and will thus be as big and bright as it's going to get in the sky. If you want to see the elusive little planet, this is your big chance. Just before sunset, look west. You will most easily see Saturn not too far above the horizon. As the minutes move forward and the sky slowly darkens, you'll notice another bright spot below Saturn. That's Mercury. Enjoy it while you can, because you'll only have about 30 minutes from its first appearance before it sinks below the horizon and thus falls out of view.

If bad weather ruins any of your November viewings, do not fret. Next month we've got meteor showers, pagan rituals, and supermoons to help bid 2017 adieu.

Stardust Created 7 Billion Years Ago Is the Oldest Stuff on Earth

NASA/JPL-Caltech/Harvard-Smithsonian CfA
NASA/JPL-Caltech/Harvard-Smithsonian CfA

Between 5 and 7 billion years ago, a dying star shot an explosion of particles through space. Some of that stardust ended up in a meteorite that landed in Murchison, Australia, in 1969. And according to new research, it's officially the oldest known solid material on Earth.

For the new study, published in the journal Proceedings of the National Academy of Sciences 30 years after the research began, scientists pulverized fragments of the meteorite to determine its age. The resulting paste-like substance reportedly smelled like "rotten peanut butter." The strange aroma "comes from byproducts of the breakdown of the abiotic organic molecules—molecules that didn't form from life—in the Murchison meteorite," lead author Philipp R. Heck, a curator at Chicago's Field Museum, tells Mental Floss.

Heck used acid to further break down the rock and isolate the grains of stardust, which are smaller than the period at the end of this sentence. To date the particles, the team measured neon isotopes that formed when cosmic rays hit the solid matter making up the stardust. The older the stardust is, the more cosmic rays it has been exposed to, so the amount of neon isotopes it contains can be used to estimate its age. Heck compares the method to collecting water in a bucket to determine how long it's been raining.

The team found that the meteorite contained particles older than 5.5 billion years and possibly as old as 7 billion years. The Earth has only been around for 4.5 billion years, and the sun for 4.6 billion. The formation of this super-old stardust is believed to have occurred during an "astral baby boom," according to a statement released by the Field Museum, in which an uptick in stellar activity literally created the matter that shapes the world we know today.

When the grains formed, "most stars that we see tonight in the sky didn’t exist," Heck says. "The bright stars that would have been shining through our galaxy were the previous generation of stars, our parent stars. [They] formed the elements that later became fuel and ingredients for the solar system, Earth, and us. These stars formed the material that we are made out of."

While the grains in the Murchison meteorite are the oldest solid material on the planet, many of the gases on Earth are much older. Some of the hydrogen in your body, for example, may have originated with the Big Bang 13.7 billion years ago.

17-Year-Old NASA Intern Helped Discover Twin-Starred 'Tatooine' Planet

NASA's Goddard Space Flight Center/Chris Smith
NASA's Goddard Space Flight Center/Chris Smith

On January 6, NASA announced that it had detected an Earth-sized planet, TOI 700 d, 100 light-years away from Earth that could be capable of hosting life. The same mission also led to the discovery of a rare planet with twin suns courtesy of a 17-year-old intern.

As CNN reports, high school student Wolf Cukier was combing through data collected by NASA's Transiting Exoplanet Survey Satellite, or TESS, when he noticed something strange about one binary star system. The system TOI 1338 consists of two stars that orbit each other once every 15 days. When the smaller of the two stars passes across the larger one, it's known as a stellar eclipse. But one signal that had been flagged as a stellar eclipse wasn't an eclipse at all; just three days into his internship at NASA's Goddard Space Flight Center, Cukier had found a planet orbiting the two stars.

The planet, since dubbed TOI 1338 b, is like a real-life version of Luke Skywalker's home planet Tatooine from the Star Wars movies. It's located roughly 1300 light-years away in the Pictor constellation and is somewhere between Neptune and Saturn in size. Twin-starred planets are rare, and this marks this first one detected through NASA's planet-hunting TESS mission.

TESS launched in 2018 with the goal of finding new planets outside our own solar system. Planets are typically discovered by recording stars over time and looking for dips in their brightness that indicate passing planets. This system becomes complicated when dealing with binary star systems, as dips in light caused by a planet in transit can get confused with an eclipsing star and vice versa. Without Cukier's keen eye, this latest discovery may have gone undetected.

It may have the same number of stars as Tatooine, but the similarities TOI 1338 b shares with the planet from Star Wars end there. So far, TOI 700 d is the only planet discovered by TESS that has a chance of being habitable.

[h/t CNN]

SECTIONS

arrow
LIVE SMARTER