'Super-Earth' Exoplanet Could Potentially Support Life (And It Also Has a Neighbor)

University of Montreal
University of Montreal

A mysterious exoplanet that astronomers have dubbed K2-18b might be a “super-Earth” that could potentially harbor extraterrestrial life, Phys.org reports. Adding to scientists’ excitement, they’ve recently discovered that this distant body is orbited by yet another Earth-like planet, called K2-18c. The findings were recently published in the journal Astronomy & Astrophysics [PDF].

Discovered in 2015, K2-18b orbits a red-dwarf star named K2-18 in the constellation Leo (about 111 light years from Earth), as does its more recently located counterpart. While both planets have masses similar to Earth, K2-18c probably can’t support life—it’s too close to the star and therefore too hot. K2-18b, on the other hand, is situated in perfect range from K2-18 to have liquid surface water, which all organisms need to live. 

Astronomers discovered the exoplanets using the European Southern Observatory’s High Accuracy Radial Velocity Planet Searcher (HARPS) instrument at the La Silla Observatory in Chile. The data they collected also allowed them to calculate the mass and density of K2-18b. According to preliminary findings, the exoplanet is either rocky with an Earth-like gaseous atmosphere, or watery and covered in ice. Further research with NASA’s James Webb Space Telescope (JWST), which launches in spring 2019, will help astronomers determine K2-18b’s true nature.

In addition to revealing K2-18b’s mass, HARPS data also revealed the presence of K2-18c. Discovering an additional exoplanet was still “lucky and equally exciting," even if it probably couldn't support life, said lead author Ryan Cloutier, a Ph.D. student at the University of Toronto Scarborough's Center for Planet Science, according to a news release.

[h/t Phys.org]

Amazon's Under-the-Radar Coupon Page Features Deals on Home Goods, Electronics, and Groceries

Stock Catalog, Flickr // CC BY 2.0
Stock Catalog, Flickr // CC BY 2.0

This article contains affiliate links to products selected by our editors. Mental Floss may receive a commission for purchases made through these links.

Now that Prime Day is over, and with Black Friday and Cyber Monday still a few weeks away, online deals may seem harder to come by. And while it can be a hassle to scour the internet for promo codes, buy-one-get-one deals, and flash sales, Amazon actually has an extensive coupon page you might not know about that features deals to look through every day.

As pointed out by People, the coupon page breaks deals down by categories, like electronics, home & kitchen, and groceries (the coupons even work with SNAP benefits). Since most of the deals revolve around the essentials, it's easy to stock up on items like Cottonelle toilet paper, Tide Pods, Cascade dishwasher detergent, and a 50 pack of surgical masks whenever you're running low.

But the low prices don't just stop at necessities. If you’re looking for the best deal on headphones, all you have to do is go to the electronics coupon page and it will bring up a deal on these COWIN E7 PRO noise-canceling headphones, which are now $80, thanks to a $10 coupon you could have missed.

Alternatively, if you are looking for deals on specific brands, you can search for their coupons from the page. So if you've had your eye on the Homall S-Racer gaming chair, you’ll find there's currently a coupon that saves you 5 percent, thanks to a simple search.

To discover all the deals you have been missing out on, head over to the Amazon Coupons page.

Sign Up Today: Get exclusive deals, product news, reviews, and more with the Mental Floss Smart Shopping newsletter!

Uranus Reaches Opposition on Halloween in 2020

Christine Schmitt, Flickr // CC BY-NC-ND 2.0
Christine Schmitt, Flickr // CC BY-NC-ND 2.0

Uranus is roughly 1.75 billion miles away from Earth, which makes it difficult to spot without a telescope most nights. But on Saturday, October 31, the seventh planet from the sun will be worth looking for. Uranus reaches opposition that night, making it appear extra bright in the night sky.

What Is Uranus at Opposition?

An opposition occurs when the Earth falls perfectly between another planet and the sun. When this happens, the sun's light appears to fully illuminate the planet's surface, boosting its brightness level to the maximum.

Uranus reaches opposition on October 31 in 2020. During this event, Uranus will hit a limiting magnitude of 5.86, which is about the minimum brightness for what's visible with the naked eye.

How to Look for Uranus at Opposition

Spotting Uranus at opposition will be slightly more difficult in 2020 than in years past. The phenomenon coincides with a full moon that will make dimmer stars and planets—including Uranus—harder to see in the night sky. The planet sits in the constellation Aries, which regrettably appears close to the moon for most of the night.

Uranus should appear as a small, blue-green disc when using a telescope. Even if you have trouble spotting the seventh planet, it will still be worth checking out the night sky on October 31: Halloween this year coincides with a rare blue moon.