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Astronomy News

Pluto and Charon

The New Horizons spacecraft captured Pluto rotating over the course of a full “Pluto day.

In July 2015, the cameras on NASA's New Horizons spacecraft captured Pluto rotating over the course of a full "Pluto day." The best available images of each side of Pluto taken during approach have been combined to create this view of a full rotation. NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
In July 2015, the cameras on NASA’s New Horizons spacecraft captured Pluto rotating over the course of a full “Pluto day.” The best available images of each side of Pluto taken during approach have been combined to create this view of a full rotation.
NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
In July 2015, New Horizons captured images of the largest of Pluto's five moons, Charon, rotating over the course of a full day. The best currently available images of each side of Charon taken during approach have been combined to create this view of a full rotation of the moon. NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
In July 2015, New Horizons captured images of the largest of Pluto’s five moons, Charon, rotating over the course of a full day. The best currently available images of each side of Charon taken during approach have been combined to create this view of a full rotation of the moon.
NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute

On approach in July 2015, the cameras on NASA’s New Horizons spacecraft captured Pluto rotating over the course of a full “Pluto day.” The best available images of each side of Pluto taken during approach have been combined to create this view of a full rotation.

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In July 2015, New Horizons captured images of the largest of Pluto’s five moons, Charon, rotating over the course of a full day. The best currently available images of each side of Charon taken during approach have been combined to create this view of a full rotation of the moon.

Continue reading Pluto and Charon →

Astronomy News

Looking Up!

dragon reads ebook final mergedSky events for December 2015

RASCal Geoff Gaherty posts an excellent blog for sky events. He tends to concentrate on the moon, planets, and brightest stars, so it’s great for urban star gazers armed with digital devices. You might want to bookmark the site and return to it when the mood grabs you.

On the 3rd of December, Japan’s Hayabasa 2 spacecraft, on a six year mission to catch and sample an asteroid, will fly past Earth. Earth’s gravity will slingshot the spacecraft toward its target, 162173 Ryugu, which Hayabasa 2 is expected to reach in July 2018. This animation from JAXA (the Japanese space agency) previews the flyby. READ MORE: http://www.spaceweather.com/


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You will not want to miss the Geminid meteor shower, which always puts on a good show.   The peak nights are expected to be on December 13-14 (night of December 13 till dawn December 14) and 14-15 (night of December 14 till dawn December 15).

orbits
In this diagram of the inner solar system, all of The fireball orbits intersect at a single point–Earth. The orbits are color-coded by velocity, from slow (red) to fast (blue). Click for larger view

Every night, a network of NASA all-sky cameras scans the skies above the United States for meteoritic fireballs. On Dec. 2, 2015, the network reported 27 fireballs. Automated software maintained by NASA’s Meteoroid Environment Office calculates their orbits, velocity, penetration depth in Earth’s atmosphere and many other characteristics. Daily results are presented on Spaceweather.com. 

Astronomy News

How to choose your first telescope

You’ll get lots of hype when trying to pick a telescope. But by knowing just a few basics, described here, you’ll be able to choose the one that’s right for your observing interests, lifestyle, and budget.

A quick guide to types of telescopes

With a little guidance, you can pick a high-quality telescope that can last a lifetime.

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S&T: Craig Michael Utter

Here’s a quick guide to help you make sense of all the types of telescope models available today. Armed with these few basics, you’ll have a good idea what to look for (and what to avoid) when scouring the marketplace for your new scope.If you still have questions or need more details, check out these additional resources:

Many (arguably most) good starter scopes cost $400 or more, though some superb choices are available for under $250. But read this article first, so you’ll understand the terminology and what type of telescope will be best for you.

Read more: http://www.skyandtelescope.com/astronomy-news/types-of-telescopes/

Astronomy News, MonSFFA Website

Looking Up! (Post Script)

Space Weather News for Oct. 24, 2015

http://spaceweather.com

3 planets
The morning planet show is a worldwide event. Pictured above is the view from Yading, China (credit: Jeff Dai).

Do not hamper your blood vessels by smoking; just find ways on how to get rid of smoking. cialis viagra canada It is important that we do what we think of toxic assumptions about the relationship of inventory. cialis 60mg There are buy cialis cialis some disadvantages however, generally hair loss and it does play a part in woman’s hair loss, so reducing how much dht is produced would be beneficial. Here is the mechanism what happens with reproductive health when an individual suffers from male impotence or erectile dysfunction or ED. levitra prescription CME IMPACT:  Arriving earlier than expected, a CME hit Earth’s magnetic field on Saturday, Oct. 24th. Solar wind speeds abruptly jumped to more than 500 km/s as the CME passed by. The shockwave rattled Earth’s magnetic field and caused electrical currents to flow through the ground of Norway’s Lofoten islands.  A full-fledged geomagnetic storm did not erupt, and few auroras have been reported. Why was the CME so ineffective? Its internal magnetic field did not connect to Earth’s magnetic field; the mismatch mitigated the CME’s impact.

MORNING SKY SHOW:  Set your alarm for dawn. Venus, Jupiter and Mars are gathering for a three-way close encounter in the early morning sky. Sky maps and observing tips are available on today’s edition of  http://spaceweather.com

From Oct. 25th to Oct. 29th Venus, Jupiter and Mars will fit together inside a circle only 5o wide (sky maps: #1, #2, #3, #4, #5). Super-bright Venus and Jupiter are visible even after the black pre-dawn sky turns cobalt blue. Once you find them, you will have little trouble locating the dimmer red planet Mars.

Astronomy News

Looking Up!

Robot looks upAn Exceptional Solar Flare:  Typical solar flares are finished in a matter of minutes. On Oct. 22nd, a solar flare in the magnetic canopy of sunspot AR2434 lasted for more than 3 hours. NASA’s Solar Dynamics Observatory recorded the eruption.

The CME is not heading directly for Earth. Nevertheless, it does have an Earth-directed component. NOAA forecast models suggest that the cloud will deliver a glancing blow to our planet’s magnetic field on Oct. 25th. There is a 50% chance of G1-class geomagnetic storms when it arrives, so watch for potential auroras on the weekend.  More information, including video of the flare: http://spaceweather.com/

Potentially Hazardous Asteroids (PHAs) are space rocks larger than approximately 100m that can come closer to Earth than 0.05 AU. None of the known PHAs is on a collision course with our planet, although astronomers are finding new ones all the time. On October 23, 2015 there were 1630 potentially hazardous asteroids.

The Moon is at perigee, Monday, October 26, 9 a.m. EDT.  The Moon will be at its closest to the Earth this month. Expect high tides for the next four days.  Full moon, Tuesday, October 27, 8:05 a.m. EDT. The October Full Moon is known as the Hunter’s Moon.  Thursday, October 29, 8:30 p.m, the Moon passes close to Aldebaran, the eye of the bull, Taurus.

Urthecast and NASA bring you live, high definition video from the ISS. Perched 250 miles (400 km) above Earth’s surface are four high-definition cameras that capture video of our planet from four unique angles. You’ll see storms swirl over the oceans, watch the sun rise and set 16 times a day, and experience the blue marble as it rolls beneath the ISS.   https://www.urthecast.com/live  

You have to be patient–bookmark the site and check in often because when the ISS is on the night side, the screen of course is black. That’s a good time to view the gallery.

Astronomy News

A Comet, an Asteroid, and a KBO

The ESA’s Rosetta and Philae observe a comet
The ESA’s Rosetta has been sending home images of comet 67P/Churyumov–Gerasimenko, AKA the Rubber Ducky. The odd shape of the comet was quite a surprise to scientists, and a hurdle for the landing of Philae.

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Rosetta_s_comet_node_full_image_2“By using high-resolution images taken between 6 August 2014 and 17 March 2015 to study the layers of material seen all over the nucleus, they have shown that the shape arose from a low-speed collision between two fully fledged, separately formed comets. “

READ More about the shaping of the Rubber Ducky
Approaching_perihelion_AnimationAt perihelion, it is estimated that Comet 67P/Churyumov–Gerasimenko, was spewing out up to 300 kg of water vapour & 1000 kg of dust per second.
READ More about Rosetta at  perihelion
 NASA’s Dawn reveals more about our largest asteroid, Ceres.
Ceres
Click to view larger image.
New Horizons to image a KBO  (Maybe)
The next  flyby will explore an ancient, intermediate-size Kuiper Belt Object (KBO) called 2014 MU69

BUT

“This flyby is contingent on NASA approving and funding a 4-year extension to the New Horizons mission — a decision planned for late summer 2016 (about when the last of our Pluto data reaches Earth)”

READ More about this mission’s goals

Astronomy News

New images of Pluto’s Moon, Charon

A fresh batch of high-resolution images from NASA’s New Horizons spacecraft shows that Charon, Pluto’s largest moon, has endured a lot.

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Charon-Neutral-Bright-Release“It looks like the entire crust of Charon has been split open,” observes John Spencer (Southwest Research Institute), who serves as deputy lead for the mission’s geology, geophysics and imaging team. Such wholesale extension might have occurred, the New Horizons team speculates, if Charon once had an interior ocean of water that expanded as it froze long ago. The overlying crust would have cracked wide open to accommodate the increased volume.

Astronomy News

Lunar Eclipse Sept 27

What’s so special about this lunar eclipse?

Not much, for astronomers, but  for the rest of us it promises a fine spectacle with a cool WOW factor. Usually, an eclipsed moon  appears blood red, but depending on the pollution in the atmosphere, the moon may appear brownish, or even bluish-grey.

Telescopes are not necessary, but binoculars will bring out a lot of detail as the shadow of the earth passes over the craters.

The moon is at perigee, so it will appear slightly larger than usual, it’s the Harvest Moon, and because of optical illusion, it appears even larger on the horizon as it rises. You will not notice much difference from one night to the next, but from Apogee to Perigee, the difference is dramatic. 

The Sept. 27 event is therefore being called a “supermoon eclipse.” The last such eclipse happened in 1982, and the next won’t occur until 2033.

This eclipse is the last of the current Tetrad, a series of 4 eclipses, each pair separated by 6 months.

In Montreal, we get to see the whole celestial show , just a little over 5 hours.

Begins at 8:11

Max totality at 10:47

Ends at 1:22 AM

Duration: 5 hours, 11 minutes

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Astronomy News

Lunar Eclipse Sept 27

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http://www.skyandtelescope.com/observing/celestial-objects-to-watch/observing-and-photographing-lunar-eclipses/

Astronomy News, MonSFFA Website

Total Lunar Eclipse Sept 27

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