Look Up Tonight! Saturn Is Big and Bright, With Rings Tilted Our Way

NASA/JPL
NASA/JPL

Look up tonight, June 14, and overnight into the early morning hours of June 15, and you’ll be able to see Saturn looming luminously in the evening sky. Bring a telescope and you might even be able to see its rings.

Tonight, Saturn is “at opposition”—that is, as close to the Earth as it's going to get this year, and therefore big and bright. It's because our orbits: We are presently in alignment with the Sun, and between it and Saturn, so from our perspective, the disc of Saturn is in full illumination. Think of it as a “full Saturn,” with the same general idea at work as when we have a full Moon.

So what are you waiting for? You’re not going to live forever. Grab a telescope and a blanket and get to the countryside. The Roman god of agriculture and wealth awaits!

HOW DO I SEE IT?

When you look at Mars through a telescope, you’re looking for the ice caps. When you look at Jupiter, you’re looking for its moons and gorgeous stripes. When you look at our Moon, you want to see the craters, ridges, and mountains along the terminator (the line dividing light and dark during the moon’s phases). Saturn, of course, is all about the rings.

Here is the good news: Any telescope of reasonable power should be able to see Saturn’s rings. (That $30 novelty telescope you bought your kid for Christmas that’s collecting dust in a closet? If it has 25x magnification—and it probably does—and if the sky is clear and light pollution low and you know what you’re doing, you can use that.)

Here’s the bad news: Saturn is smaller than Jupiter and a lot farther away from the Earth. Right now, even as it nears opposition, it's nine astronomical units away. (An astronomical unit is the distance between the Sun and the Earth.) This means you should prepare yourself for something less spectacular than Cassini-generated images. It’s going to be small. It’s going to be fuzzy. But it will be recognizable as Saturn, and it's a good year to try to spot its rings.

the rings of saturn
NASA/JPL-Caltech/Space Science Institute

A good view of the rings is not always a guarantee. Some years, the rings are edge-on when seen through a telescope, making them appear more as a single flat line bisecting the planet than as actual rings circling an alien world. (Without enough magnification, the rings might seem to vanish entirely.) Other years, the rings are “open,” Saturn’s pole tilting our way, and you get that wonderful Glamour Shots pose, the rings 45-degrees forward and giving the camera all it’s got. This is because of the planet's orbit and tilts.

Why is it so important for you to get out there and check out Saturn tonight? Because 2017 is a “wide open” year. You’re going to see it all, and with enough telescope, you’ll even be able to make out the gap between the rings and the planet. Saturn will first creep over the southeastern horizon just after 9:30 p.m. EDT on June 14, and will reach its highest point in the sky around 1:30 a.m. This is the best time for viewing: a high, bright Saturn, due south and with rings aplenty. If you’re setting an alarm, give yourself a lot of time to set up and for your eyes to adjust to the darkness. The usual conditions apply: You need a clear sky and no light pollution.

If the weather is bad tonight or you have unbreakable plans, take heart: Saturn will look virtually identical tomorrow night—so much so that beginning at 8 pm EDT on June 15, Slooh is hosting a livestream of the planet featuring views from telescopes and live commentary by astronomers.

SOON THE ONLY WAY TO SEE IT

After September 15, the only way anyone will be able to see Saturn’s rings is to use a telescope, whether of the backyard or the Hubble variety. That’s because NASA’s Cassini spacecraft, which first arrived in the Saturnian system on July 1, 2004, will finally arrive at the end of its mission on that day. Cassini’s grand finale will see the spacecraft plunge into the mysterious atmosphere of the gas giant, where it will disintegrate, though not before returning data revealing the nature of the planet’s magnetosphere and surface winds, and providing some idea of composition of its core.

Cassini is at present still orbiting Saturn, though you will not be able to see the spacecraft with your telescope tonight, even if you do have access to Hubble.

Here’s What You Need to Know About the New Coronavirus

jarun011/iStock via Getty Images
jarun011/iStock via Getty Images

This morning, the Centers for Disease Control and Prevention (CDC) confirmed the second case of the recently discovered coronavirus in the U.S. Find out what it is, where it is, how to avoid it, and all the other need-to-know information about the illness below.

What is the new coronavirus?

Coronaviruses are a group of viruses named for the crown-shaped spikes that cover their surfaces (corona is the Latin word for crown). According to the CDC, human coronaviruses can cause upper-respiratory tract illnesses, including the common cold, and can sometimes lead to more severe lower-respiratory tract issues like pneumonia or bronchitis.

Because this latest coronavirus, 2019-nCoV, is so new, health officials are currently trying to figure out how it works and how to treat it. It’s not the first time a potent new coronavirus has caused an international outbreak: SARS-CoV originated in Asia and spread to more than two dozen countries in 2003, and MERS-CoV first infected people in Saudi Arabia before spreading across the globe in 2012.

Where is the coronavirus outbreak happening?

The majority of cases are in China, which counts more than 800 confirmed diagnoses. Most are in Wuhan, a city in China’s Hubei province where 2019-nCoV was first detected last month. Additional cases have been reported in South Korea, Japan, Singapore, Hong Kong, Macao, Taiwan, Thailand, and Vietnam.

The CDC has confirmed two U.S. cases—a man in his thirties outside Seattle, and a 60-year-old woman in Chicago—both of whom had recently returned from trips to Wuhan. A CDC official said another 63 potential cases are being investigated in 22 states, and airports in New York, Chicago, Los Angeles, Atlanta, and San Francisco are conducting health screenings on passengers arriving from China.

Chinese officials have shut down transportation to and from Wuhan. Tourist spots like Beijing’s Forbidden City, Shanghai Disneyland, and a portion of the Great Wall are also closed temporarily.

What are the symptoms of the new coronavirus?

Symptoms are similar to those caused by a cold or the flu, including fever, dry cough, and breathing difficulty. The New York Times reported that as of Friday morning, 25 people in China have died from the virus, and most of them were older men with preexisting health conditions like cirrhosis, diabetes, and Parkinson’s disease.

How does the new coronavirus spread?

Because most of the early cases of 2019-nCoV were traced back to a seafood and meat market in Wuhan, health officials think the virus originally spread from infected animals to humans, but it’s now being transmitted from person to person.

Though scientists are still studying exactly how that happens, the leading theory is that it travels in tiny droplets of fluid from the respiratory tract when a person coughs or sneezes.

How do you avoid the new coronavirus?

The CDC is warning everyone to avoid any nonessential trips to Wuhan, and to avoid animals or sick people if you’re traveling elsewhere in China. If you’ve been to China in the last two weeks and experience any of the symptoms listed above, you should seek medical attention immediately—and you should call the doctor’s office or emergency room beforehand to let them know you’re coming.

Otherwise, simply stick to the precautions you’d normally take when trying to stay healthy: Wash your hands often with soap and water, cover your nose and mouth when coughing or sneezing, stay away from sick people, and thoroughly cook any meat or eggs before eating them.

Should you be worried about the new coronavirus?

The global health community is taking 2019-nCoV seriously in order to curb the outbreak as quickly as possible, but you shouldn’t panic. The CDC maintains that it’s a low-risk situation in the U.S., and public health officials are echoing that message.

“We don’t want the American public to be worried about this, because their risk is low,” Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, told USA Today.

[h/t USA Today]

Has An Element Ever Been Removed From the Periodic Table?

lucadp/iStock via Getty Images
lucadp/iStock via Getty Images

Barry Gehm:

Yes, didymium, or Di. It was discovered by Carl Mosander in 1841, and he named it didymium from the Greek word didymos, meaning twin, because it was almost identical to lanthanum in its properties. In 1879, a French chemist showed that Mosander’s didymium contained samarium as well as an unknown element. In 1885, Carl von Weisbach showed that the unknown element was actually two elements, which he isolated and named praseodidymium and neodidymium (although the di syllable was soon dropped). Ironically, the twin turned out to be twins.

The term didymium filter is still used to refer to welding glasses colored with a mixture of neodymium and praseodymium oxides.

One might cite as other examples various claims to have created/discovered synthetic elements. Probably the best example of this would be masurium (element 43), which a team of German chemists claimed to have discovered in columbium (now known as niobium) ore in 1925. The claim was controversial and other workers could not replicate it, but some literature from the period does list it among the elements.

In 1936, Emilio Segrè and Carlo Perrier isolated element 43 from molybdenum foil that had been used in a cyclotron; they named it technetium. Even the longest-lived isotopes of technetium have a short half-life by geological standards (millions of years) and it has only ever been found naturally in minute traces as a product of spontaneous uranium fission. For this reason, the original claim of discovery (as masurium) is almost universally regarded as erroneous.

As far as I know, in none of these cases with synthetic elements has anyone actually produced a quantity of the element that one could see and weigh that later turned out not to be an element, in contrast to the case with didymium. (In the case of masurium, for instance, the only evidence of its existence was a faint x-ray signal at a specific wavelength.)

This post originally appeared on Quora. Click here to view.

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