Daily Archives: 2016-07-18

Astronomy News

Astronomers snap a picture of a head-scratching planet in a triple-star system

From Astronomy Magazine
HD 131399Ab is relatively young and farther from its parent star than any confirmed planet in our solar system.

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By John Wenz  |  Published: Thursday, July 07, 2016
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The image of the HD 131399 system, with primary star A toward the top, the planet in the middle, and stars B and C in the lower right. The images were taken by the SPHERE instrument at ESO’s Very Large Telescope. ESO/K. Wagner et al.

There are plenty of weird planets in the Milky Way, but HD 131399Ab may be one of the weirdest.

Discovered in a survey of 100 young stars, the 16 million-year-old planet still glows hot enough for astronomers to image it directly. Somehow in those short few million years, it migrated out 80 astronomical units (AU; one AU is the average Earth-Sun distance) from its parent star.

But also accompanying the parent star, which is a little bit bigger than the Sun, are two companion stars in orbit around each other at a distance of 300 to 400 AU.

“In this case, this planet is much closer to the other stars in the system than any known exoplanets in a multi-star system,” says Kevin Robert Wagner, a graduate student at the University of Arizona and lead author of the discovery paper, published today in Science.

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MonSFFA special event

Field Trip!

August 6th, early in the morning, MonSFFA is headed for strange new worlds! In Ottawa…

http://casmuseum.techno-science.ca/en/whats-on/exhibition-star-trek-starfleet-academy.php

Star Trek: The Starfleet Academy Experience

The Starfleet Academy Experience provides cadet recruits with an opportunity to experience a “career day” at the Academy. In an immersive environment, recruits try out a number of activities to test their potential to train for careers as Medical Officers, Science Officers, Communications specialists, even Commanders. The experience is enriched with the actual science behind the science fiction as the participants learn about emerging technologies such as a functional tricorder, NASA’s warp drive theory, and the latest experiments with phasers and teleporters.

Unfortunately, the transporters are not yet fully functional, so car pools are being arranged.  Cars will be leaving from Fairview Shopping Mall and the Espresso Hotel. If you need a lift, contact veep@monsffa.ca  or president@monsffa.ca  Please be patient, neither of us will be able to check email daily.

Departure time is 8:00 sharp, the idea is to be scheduled for the same time to the exhibit.

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http://casmuseum.techno-science.ca/en/visit-the-museum.php

Television

new Star Trek series in Canada

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The Bell Media rollout for the new Star Trek series in Canada will mirror the launch in the United States. The first episode will premiere on Canada’s most-watched broadcast network, CTV, on the same night as CBS. All remaining episodes will initially be televised on Bell Media’s cable networks, Space (in English) and Z (in French), and then later exclusively on CraveTV, Bell Media’s streaming video-on-demand service. The Star Trek television library will return to Space (in English) and debut on Cinépop (in French), and will also be found among CraveTV’s leading lineup of premium television series. – See more at: http://www.startrek.com/article/international-broadcasters-set-for-new-star-trek-series#sthash.N1CtuNN1.dpuf

Astronomy News

Sunspots and Aurora Watch

From Space Weather.com

AURORA WATCH: A solar wind stream is expected to hit Earth late on July 19th, and this could spark G1-class geomagnetic storms around the poles. High-latitude sky watchers should be alert for auroras, especially in the southern hemisphere where dark winter skies favour visibility of faint lights. [aurora gallery]

BIG SUNSPOTS: Solar activity has been low for months. This could soon change. Two big sunspot groups are directly facing Earth, and one of them has an unstable magnetic field that poses a threat for M-class solar flares. Bill Hrudey photographed the active regions on July 16th from Cayman islands:

“Sunspots AR2567 & AR2565 are great imaging targets surrounded by many granules,” says Hrudey.

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As if granules weren’t big enough, the primary dark cores of these sunspots are twice as wide as the entire Earth. Great targets indeed. If you have a solar telescope, take a look.

 

Astronomy News

A New Look at the Crab Nebula

From Sky and Telescope

A new Hubble Space Telescope image shows the very heart of the Crab Nebula, one of the most studied supernova remnants.

This image shows the very heart of the Crab Nebula including the central neutron star — it is the rightmost of the two bright stars near the center-right of this image. The rapid motion of the material nearest to the central star is revealed by the subtle rainbow of colors in this time-lapse image, the rainbow effect being due to the movement of material over the time between one image and another. NASA, ESA

This image shows the very heart of the Crab Nebula including the central neutron star — it is the rightmost of the two bright stars near the center-right of this image.
The rapid motion of the material nearest to the central star is revealed by the subtle rainbow of colors in this time-lapse image, the rainbow effect being due to the movement of material over the time between one image and another.
NASA, ESA

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In A.D. 1054, Chinese and Japanese astronomers first observed a new star in the sky. Second only to the moon in brightness, the new object turned out to be the Crab Nebula. The Crab Nebula, a supernova remnant, has been well-studied over the years and is one of the most recognizable deep-sky objects.

But thanks to the Hubble Space Telescope’s sharp eye, we can look at the supernova remnant in a way never before seen. Technicians combined three high-resolution HST images that used two different kinds of filters (606nm and 550nm) and were taken about ten years apart.

Many popular images of this object highlight the dazzling filaments in the outer regions, but this new look shows just the inner part of the nebula, revealing what’s left of the original star. This mysterious object is known as a neutron star. Made entirely of neutrons (hence the name), it has the same mass as the Sun. Yet all of that mass is compressed into a sphere only a few tens of kilometers across. A neutron star is so dense that single teaspoon of its matter would weigh as much as a mountain!

Hubble also captured the complex details of the ionized gas, shown in red, that form an intricate mélange of cavities and filaments around the edges of this image. A ghostly blue glow surrounds the spinning neutron star — which rotates approximately 30 times per second — deep within the shell of ionized gas. The subtle rainbow effect seen in this composite image is due to the rapid motion of the material nearest the star in the time-lapse between one image and another.

The Crab Nebula lies 6,500 light-years away in the Taurus constellation. Its long observation history has made it a valuable object to study supernova remnants and has enabled astronomers to probe the lives and deaths of stars.