Category Archives: Astronomy News

Astronomy News

Balloons for the 2017 eclipse

http://spaceweather.com/

INTERCONTINENTAL BALLOON NETWORK: Aug 21, 2016, is an important date. It’s the one year pre-anniversary of the Great American Solar Eclipse. On Aug. 21, 2017, the Moon will pass in front of the sun, producing a total eclipse visible from coast to coast in the USA. To record the eclipse as never before, Spaceweather.com and the students of Earth to Sky Calculus will lead more than a dozen teams of citizen scientists in launching balloons through the path of totality. Our goal: to photograph the eclipse from the stratosphere and create a unique movie of the Moon’s shadow sweeping across the continent. Such an ambitious project requires practice, and we’re starting now:

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For the next month, we’ll be launching groups of balloons from multiple sites around North and South America. Each site (including the one in Chile) will be crewed by students and teachers involved in the Solar Eclipse Balloon Network. Launching large numbers of balloons simultaneously is a key logistical challenge for the 2017 eclipse, and this will be good practice indeed. The first launch on Aug. 21st will involve as many as four balloons lifting off from Chile, California, Oregon and Illinois.

Because our standard eclipse payload includes radiation sensors, we will be learning a great deal about the geographical distribution of cosmic rays in Earth’s atmosphere. The Chilean launch, in particular, promises interesting results as it occurs directly beneath the South Atlantic Anomaly. Stay tuned!

http://spaceweather.com/

Astronomy News

SPACE LIGHTNING OVER CHINA

http://spaceweather.com/

SPACE LIGHTNING OVER CHINA: On Aug. 13th in China, photographer Phebe Pan was photographing the night sky, hoping to catch a Perseid meteor. Instead, he witnessed a spectacular bolt of “space lightning.” Working atop Shi Keng Kong, the highest mountain peak in the Guangdong province, “I was using a fisheye lens to capture as much of the sky as possible,” says Pan. “Suddenly we saw a flash of blue and purple ejected from the top of a nearby thundercloud. It just looked like a tree with branches, and grew up very fast. So awesome!”

“It just looked like a tree with branches, and grew up very fast,” says Pan. “It lasted just less than one second. So awesome!”

Oscar van der Velde, a member of the Lightning Research Group at the Universitat Politècnica de Catalunya, explains what Pan saw: “This is a very lucky capture of a gigantic jet. It’s the first time I’ve seen one captured using a fisheye lens!”
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Think of them as sprites on steroids: Gigantic jets are lightning-like discharges that spring from the tops of thunderstorms, reaching all the way to the ionosphere more than 50 miles overhead. They’re enormous and powerful.

“Gigantic jets are much more rare than sprites,” says van der Velde. “While sprites were discovered in 1989 and have since been photographed by the thousands, it was not until 2001-2002 that gigantic jets were first recorded from Puerto Rico and Taiwan.” Only a few dozen gigantic jets have ever been seen.

Like their cousins the sprites, gigantic jets reach all the way up to the edge of space alongside meteors, noctilucent clouds, and some auroras. This means they are a true space weather phenomenon. Indeed, some researchers believe cosmic rays help trigger these exotic forms of lightning, but the link is controversial.

http://spaceweather.com/

Astronomy News

Long range sensors detect…

  1.  Curiosity gets a new AI system
  2.  Supernova that exploded TWICE!
  3.  Amateurs Aid in Discovery of Pulsing White Dwarf
1. NASA upgraded Curiosity with computer vision, letting it choose interesting rocks on its own.

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NASA-JPL; Mars rover Curiosity now has its own built-in curiosity.

NASA recently installed a new AI system called AEGIS to autonomously choose targets for its laser detection system.

The AEGIS algorithm analyzes images taken by the rover’s navigation camera (Navcam). AEGIS can select a target rock and pinpoint it with the rover’s laser system, ChemCam, before scientists on Earth have time to look at the images. ChemCam then determines what kinds of atoms the rock contains. The new autonomy is especially useful when Curiosity is in the middle of a long drive, or when there are delays in sharing information with scientists on Earth. READ MORE

2. Astronomers find a superluminous supernova that seems to have exploded twice.

Most supernovae explode only once, but a newly found superluminous star did something truly bizarre: it exploded twice.  A recently discovered class of supernovae called superluminous supernovae (SLSN) are brighter and longer-lasting. Only a dozen or so have been found, and using the Gran Telescopio CANARIAS (GTC), astronomers have found evidence of another, but reveals surprising behavior. It seems to have exploded not only once, but twice.

3. Io has a unique collapsing atmosphere

Jupiter’s closest moon, Io, has an atmosphere that collapses when it is eclipsed by the gas giant.

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An artist’s interpretation of Io’s collapsing atmosphere when in Jupiter’s shadow

As one of the four Galilean moons, Io has played an important role in Astronomy since its discovery in 1610. It is the fourth largest moon in the solar system while also being the most geologically active, but a new study may add a new and interesting aspect to this moon.

Using the the Gemini North telescope and its instrument the Texas Echelon Cross Echelle Spectrograph (TEXES), a group of scientists documented unique atmospheric changes on Io. They found that Io’s thin atmosphere, which is mostly sulfur dioxide gas vented from volcanoes, collapses and freezes onto the surface when shaded by Jupiter.  READ MORE

3. Amateurs Aid in Discovery of Pulsing White Dwarf

AR Scorpii: white dwarf and red dwarf binary
An artist’s impression shows the exotic binary system, AR Scorpii. M. Garlick / University of Warwick / ESO

In the July 28th Nature, researchers announced the discovery of a pulsing white dwarf, part of the system 380 light-years from Earth known as AR Scorpii. Amateur astronomers have long kept an eye on AR Sco, thinking they were watching the flickering of a single variable star. But when they took more detailed observations last year, they saw entirely unexpected behavior and began a fruitful collaboration with professional astronomers to find out the answer.

A multitude of ground- and spacebased observations later, and astronomers now have a working hypothesis that explains the system. AR Sco is not one star but two: a cool red star and its companion, a white dwarf generating a lighthouse beam of energetic particles. The two revolve around each other every 3.6 hours in a precise cosmic dance. The white dwarf is spinning too, lashing its companion with the beam again and again, causing the whole system to brighten dramatically and fade away again every 1.97 minutes. READ MORE

Astronomy News

This Week’s Sky at a Glance, August 12 – 20

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Astronomy News

Choosing binoculars for Astronomy

I am often asked to recommend a first telescope, and I begin by recommending binoculars. The field of view in a telescope is very small, and you need to know the sky quite well to find anything.

I went prowling the Internet for sites that do a good job of explaining binocs, how they work, and how to choose the pair you need for astronomy and found these:

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http://www.space.com/26021-best-binoculars.html

http://www.skyandtelescope.com/astronomy-equipment/choosing-astronomy-equipment/binoculars/

Astronomy News

View The Perseid Meteor Shower: Free Public Event at RASC MTL Observatory

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Come join us this coming Saturday, August 13th, 8PM at the Morgan Arboretum in Ste-Anne-de-Bellevue for a FREE PUBLIC EVENT.

It is time for nature’s annual fireworks show, The Perseid Meteor Shower.
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We will have a presentation (rain, clouds or hopefully clear skies) and then we will venture outside (if it is clear) around the Bellevue Observatory to sit back and enjoy the BIG SHOW.

Bring a chair or blanket and some bug spray.

Astronomy News

International Space Station

If you have not yet seen the Space Station, it is over Montreal a few days this week.

Tonight:
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Time: Wed Aug 10 9:11 PM, Visible: 4 min, Max Height: 61°, Appears: 33° above NW, Disappears: 15° above ESE

Astronomy News

CHINESE ROCKET BURNS UP OVER NORTH AMERICA

 The body of China’s experimental Long March 7 rocket re-entered Earth’s atmosphere on Wednesday night, July 27th, around 9:38 p.m. Pacific Time, creating a bright fireball over the western USA. The glowing trail was spotted in Utah, Nevada and much of California.


Ron Sappington photographed the breakup over Santa Clara, Utah

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Astronomy News

Mars 2020 Rover Construction Moves Ahead

This rover will have microphones–something that many have been waiting for a long time.

This article has a great diagram of the instruments on board.  READ MORE.

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Astronomy News

Observe NOCTILUCENT CLOUDS

From SpaceWeather.com

Observing tips: Look west 30 to 60 minutes after sunset when the sun has dipped ~10 degrees below the horizon. If you see luminous blue-white tendrils spreading across the sky, you may have spotted a noctilucent cloud.

NOCTILUCENT CLOUDS INVADE THE USA: Summer is the season for noctilucent clouds. For sky watchers in the United States, “noctilucent summer” has just begun. On July 14th, a bright bank of electric-blue clouds rippled over the Canadian border into the USA. Greg Johnson of Seattle, Washington, photographed the display over the Puget Sound:

Dustin Guy of Seattle saw them too. “I witnessed the most vibrant NLC display that I’ve seen in a number of years,” he says. “They lit up the water of Lake Washington at 330 AM local time.”

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In the 19th century, you had to travel near Arctic latitudes to see these clouds. In recent years, however, they have been sighted as far south as Colorado and Kansas. The spread could be a result of climate change. July is usually the best month for NLCs. Sky watchers in the northern half of the USA should be alert for them for the next two weeks.

Observing tips: Look west 30 to 60 minutes after sunset when the sun has dipped ~10 degrees below the horizon. If you see luminous blue-white tendrils spreading across the sky, you may have spotted a noctilucent cloud.