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A Tour of the Summer Triangle

While not a constellation itself, the Summer Triangle dominates the overhead sky in the northern summer and autumn months and guides stargazers to other stars, constellations, and deep-sky sights. Click on the link at bottom for a quick tour of this famous asterism...
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Tiny Glider Could Cruise Through Martian Skies ... Mike Wall -- " A tiny aircraft could be plying Mars' skies less than a decade from now.

NASA researchers are developing a glider, called Preliminary Research Aerodynamic Design to Land on Mars (Prandtl-m), for possible inclusion on a Mars rover mission in the 2022-2024 time frame.

Prandtl-m would weigh a maximum of 2.6 lbs. (1.2 kilograms) here on Earth (1 lb., or 0.45 kg, in Mars' reduced-gravity environment) and feature a wingspan of just 24 inches (61 centimeters), project team members said. The craft would fold up to fit inside a 3U cubesat — a spacecraft about the size of a loaf of bread — that would tag along with the rover.

"The aircraft would be part of the ballast that would be ejected from the aeroshell that takes the Mars rover to the planet," Prandtl-m program manager Al Bowers, the chief scientist at NASA's Armstrong Flight Research Center in Edwards, California, said in a statement.

"It would be able to deploy and fly in the Martian atmosphere and glide down and land," Bowers added. "The Prandtl-m could overfly some of the proposed landing sites for a future astronaut mission and send back to Earth very detailed high-resolution photographic map images that could tell scientists about the suitability of those landing sites."

The glider would have a flight time of 10 minutes in the Martian sky, and could cover about 20 miles (32 kilometers), Bowers said. ..."

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On this christmas we celebrate Sir Isaac Newtons 372nd birthday. Among his many accomplishments, one was his grav law. This law helped us understand the motion between the intergalactic bodies. We bow down to the great man.
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On the old world calender maybe 
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Pluto in Colour by NASA's New Horizon that Reveals Two Distinct Faces of Pluto

New colour images from NASA’s New Horizons spacecraft show two very different faces of the mysterious planet, one with a series of intriguing spots along the equator that are evenly spaced. Each of the spots is about 480 Km (300 miles) in diameter. 

Credit: NASA Home Page
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I believe it tells you what it is. .the two faces of front & back. .like if you took a picture of earth from one side you'd see Africa, Europe middle East..from the other. .probably Alaska, Canada, N. & S America etc...?
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This mid-level (M1.2) solar flare was accompanied by a magnificent prominence (filament, if observed on the solar disk) eruption that turned into an impressive coronal mass ejection (CME) on June 18, 2015.

During the rising phase of eruptions, prominences often exhibit complex pre-flare disturbances, typically showing short-lived helical structures in the lower corona. 

Watch the video

Isabel Eludeme's profile photoSabrina P.'s profile photoromisha patel's profile photoNamah Koosseeal's profile photo
Can we take picture of that?
if yes,then let me know HOW?
and which telescope is used for it?
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“For all physicists know, dragons could have come flying out of the singularity,” said Niayesh Afshordi, an astrophysicist at the Perimeter Institute for Theoretical Physics in Waterloo, Canada. Big Bang was a mirage from collapsing higher-dimensional star, theorists propose. While the recent Planck results “prove that inflation is correct”, they leave open the question of how inflation happened.

#Universe #BigBang #Cosmology #Cosmologists #TheoreticalPhysics #Physics #Physicists #Singularity #Science 
“For all physicists know, dragons could have come flying out of the singularity,” said Niayesh Afshordi, an astrophysicist at the Perimeter Institute for Theoretical Physics in Waterloo, Canada. Big Bang was a mirage from collapsing higher-dimensional star, theorists propose. While...
Simon John Canning's profile photoRichard Brackin's profile photoEugene Hayes's profile photoNik Nazarevsky's profile photo
Hang on. I may need to read that again.
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Air Force Invited To Observe SpaceX Launch Failure Investigation
"PENTAGON: Word from the Air Force is that SpaceX “remains certified” to launch the nation’s most expensive and heaviest intelligence and Air Force satellites.

It took a few days, which is not surprising how politically and legally sensitive everything involving +Elon Musk  and +SpaceX  national security launch certification is and will be, but we got responses from Lt. Gen. Samuel A. Greaves, commander of Space and Missile Systems Center, about #SpaceX certification and the effects of the destruction of the #CRS7 mission to resupply the International Space Station.

“Q1. Does this failure prompt review of certification for national security launches?
“A1. No, SpaceX remains certified.”

It’s worth noting that a failure as complete as this one was — CRS-7 was completely destroyed — does not prompt a review of certification. That would seem to indicate that certification, once granted, is forever. UPDATE BEGINS However, later in the day we heard from SMC that certification is not forever.

Greaves made it clear that decertification could occur should a national security space mission be destroyed or fail to achieve its primary objectives due to launch problems. “Once a launch provider is certified, they may be decertified if after an assessment by the Air Force, it is determined they do not meet certification requirements,” he said. “The loss of an NSS mission would first be investigated to determine the root cause and the result of the investigation would drive assessments on whether or not the root cause of the failure affects certification.” UPDATE ENDS

The second question and response is more detailed.

“Q2. What is the process for review after a launch or other failure?
“A2. Every launch-whether successful or not-undergoes a thorough post-flight review. More detailed investigations are performed for any flight conditions that differ from nominal predictions. This was not a Department of Defense launch. SpaceX will lead the accident investigation with support from #NASA and the Federal Aviation Administration, which issued the launch license. The +United States Air Force has been invited to observe this investigation and has offered full support.”

The fact that we got a response from +Space and Missile Systems Center Los Angeles AFB, attributable to Greaves, is fairly remarkable. SMC is renowned among defense reporters for being generally resistant to all forms of wheedling, cajoling, bullying and pleading. (We hope this is a signal that is changing –permanently.) With the White House believed to be closely watching the treatment of Musk, SMC and the Air Force deserve a tip of the hat given that our questions didn’t vanish into space."

Read the full article at:
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See Mercury in the Eastern Sky Before Sunrise

Early risers can spot the planet Mercury low on the eastern horizon before sunrise in early July 2015. The planet shines at an impressive magnitude -1.5, brighter than any star, but it’s low on the horizon and somewhat diminished by the brightening predawn sky. The bright orange-giant star Aldebaran is nearby Mercury, as are the Hyades and Pleiades star clusters. A pair of binoculars will help pull these stars out of the sky glow.
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Tonight's Sky: July 2015

Backyard stargazers get a monthly guide to the northern hemisphere's skywatching events with "Tonight's Sky." In July, the Lagoon, Trifid and Omega nebulae are dazzling sights.

Credit: HST
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01 July 2015
A number of the dust jets emerging from Rosetta’s comet can be traced back to active pits that were likely formed by a sudden collapse of the surface. These ‘sinkholes’ are providing a glimpse at the chaotic and diverse interior of the comet.

Rosetta has been monitoring Comet 67P/Churyumov–Gerasimenko’s activity for over a year, watching how its halo of dust and gas grows as the comet moves closer to the Sun along its orbit.

From a distance of a few hundred kilometres, Rosetta observes an intricate pattern of the dust jets emitted from the nucleus as they stream out into space. But now, thanks to high-resolution images from the OSIRIS camera from distances of just 10–30 km from the comet centre last year, at least some of these dust jets can be traced back to specific locations on the surface, the first time this has ever been seen.

Active regions in Seth
In a study reported today in the science journal Nature, 18 quasi-circular pits have been identified in the northern hemisphere of the comet, some of which are the source of continuing activity.

The pits are a few tens to a few hundreds of metres in diameter and extend up to 210 m below the surface to a smooth dust-covered floor. Material is seen to be streaming from the most active pits.

“We see jets arising from the fractured areas of the walls inside the pits. These fractures mean that volatiles trapped under the surface can be warmed more easily and subsequently escape into space,” says Jean-Baptiste Vincent from the Max Planck Institute for Solar System Research, lead author of the study.

Scientists analysing the images think that the pits are formed when the ceiling of a subsurface cavity becomes too thin to support its own weight and collapses as a sinkhole. This exposes the fractured interior of the comet, allowing otherwise hidden material to sublimate, thus continuing to erode the pit over time.

Active pits
“Although we think the collapse that produces a pit is sudden, the cavity in the porous subsurface could have growing over much longer timescales,” says co-author Sebastien Besse, of ESA’s ESTEC technical centre in the Netherlands.

The authors suggest three possible ways the voids are formed.  

One idea is that they have existed since the comet itself formed, as a result of very low-speed collisions between primordial building blocks tens to hundreds of metres in size. The collapse of the roof above such a void could then be triggered through weakening of the surface, perhaps by sublimation or via seismic shaking or impact from boulders ejected from elsewhere on the comet.

Another possibility is the direct sublimation of pockets of volatile ices like carbon dioxide and carbon monoxide below the surface, heated by the warmth of sunlight penetrating an insulating top layer of dust.

Alternatively, sublimation could be driven by the energy liberated by water ice changing its physical state from amorphous to crystalline then sublimating the more volatile surrounding carbon dioxide and carbon monoxide ices.

Continue reading below

Comet pit formation
If either of the latter two processes is the driving force, then the fact that the pits are not seen everywhere may indicate an uneven distribution of ices inside the comet.

“Regardless of the processes creating the cavities, these features show us that there are large structural and/or compositional differences within the first few hundred metres of the comet’s surface and the cavities are revealing relatively unprocessed materials that might not otherwise be visible,” adds Sebastien.

The authors note that the internal features revealed on the pit walls vary quite significantly from pit to pit, and include fractured material and terraces, horizontal layers and vertical striations, and/or globular structures nicknamed ‘goosebumps’.

“We think that we might be able to use the pits to characterise the relative ages of the comet’s surface: the more pits there are in a region, the younger and less processed the surface there is,” explains Jean-Baptiste.

“This is confirmed by recent observations of the southern hemisphere: this is more highly processed because it receives significantly more energy than the northern hemisphere, and does not seem to display similar pit structures.”

The evolution of comet pits
The active pits are particularly steep-sided, whereas pits without any observed activity are shallower and may instead indicate regions that were active in the past. The team suggests that the active pits are the youngest, while middle-aged pits exhibit boulders on their floors that have fallen from the sides. Meanwhile, the oldest pits have degraded rims and are filled with dust.

“We are continuing to analyse our observations to see if this theory holds true, and if this ‘time series’ is related to the internal thermal evolution of the comet, for example,” adds Sebastien.

“But we think that most of the active pits must have been present for several orbits around the Sun already, or else we would have expected to see a number of outbursts as their collapses were triggered this time around."

Rosetta did witness one outburst during its approach to the comet in April 2014, which is thought to have generated between 1000 kg and 100 000 kg of material. The authors state that a pit collapse could have been the driver for this outburst, but only a small fraction of the total volume of a typical pit could have been liberated at the time.

For example, given the measured average comet density of 470 kg per cubic metre, the rapid evacuation of a typical large pit 140 m wide and 140 m deep would result in the release of around a billion kilograms of material, several orders of magnitude greater than was observed in April 2014.

“We are very interested to see how these active pits evolve and maybe we’ll even witness the formation of a new pit,” says Matt Taylor, ESA’s Rosetta project scientist.

“Being able to observe changes in the comet, in particular linking activity to features on the surface, is a key capability of Rosetta and will help us to understand how the comet’s interior and surface have evolved since its formation.

“And with the extension of the mission until September 2016, we can do the best job possible at unravelling how comets work.”

Notes for Editors

“Large heterogeneities in comet 67P as revealed by active pits from sinkhole collapse,” by Jean-Baptiste Vincent et al is published in Nature.


The scientific imaging system OSIRIS was built by a consortium led by the Max Planck Institute for Solar System Research (DE) in collaboration with CISAS, University of Padova (IT), the Laboratoire d'Astrophysique de Marseille (FR), the Instituto de Astrofísica de Andalucia, CSIC (ES), ESA’s Scientific Support Office (NL), the Instituto Nacional de Técnica Aeroespacial (ES), the Universidad Politéchnica de Madrid (ES), the Department of Physics and Astronomy of Uppsala University (SE), and the Institute of Computer and Network Engineering of the TU Braunschweig (DE). OSIRIS was financially supported by the national funding agencies of Germany (DLR), France (CNES), Italy (ASI), Spain (MEC) and Sweden (SNSB) and the ESA Technical Directorate.

About Rosetta

Rosetta is an ESA mission with contributions from its Member States and NASA. Rosetta's Philae lander is contributed by a consortium led by DLR, MPS, CNES and ASI.

For further information, please contact:

Markus Bauer

ESA Science and Robotic Exploration Communication Officer

Tel: +31 71 565 6799

Mob: +31 61 594 3 954


Jean-Baptiste Vincent
Max Planck Institute for Solar System Research, Gottingen, Germany

Sebastien Besse

Matt Taylor

ESA Rosetta project scientist

A number of the dust jets emerging from Rosetta’s comet can be traced back to active pits that were likely formed by a sudden collapse of the surface. These ‘sinkholes’ are providing a glimpse at the chaotic and diverse interior of the comet.
David Thomson's profile photoLilith von Fraumench's profile photo
Collapsing sinkholes on a comet? Just what do they think the gravitational force would be to eject fine particles in tight jets? Just give in and admit there are electrical forces eroding the comet and ejecting fine particles into space.
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Samir Dutta

General  - 
How can space exploration improve life back on Earth?"
As part of Channel 4's extensive look at the world of Space from the point of view of NASA, the Virgin Founderwas recruited to ask astronaut Doug Wheelock a special question:
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Here" a site of interest regarding the space shuttle:
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Sign at my auto repair center
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Russian spacecraft successfully launches to International Space Station

+Forbes: An unmanned Russian cargo ship was successfully launched from Kazakhstan Friday, less than a week after a SpaceX cargo flight exploded and a little over two months since Russia's Progress 59 craft suffered a failure which prevented it from reaching the International Space Station.
The spacecraft is carrying vital supplies to the space station and is expected to arrive July 5 at am ET.

Follow updates:

#SpaceCraft #Space #ISS #Russia #Kazakhstan
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I recently posted to this community about the Eridanus Void. Just now, I wanted to comment on the post but found it had been removed. I noticed some comments questioning the validity of the post. It's unfortunate that those opinions had no legitimate basis.

It's important to me that the moderator and members of this community know I respect them and would never leave a post without verifying the information first. The comment I intended for the Eridanus Void post contains valid sources of information about the subject. I will leave it here as evidence that I do not post to this community thoughtlessly.

Thank you for reading. Please, enjoy your day. 

+Ciro Villa 
This is my comment:
I posted this for people who enjoy researching cosmic puzzles as much as I do. Scientists haven't agreed on what the Eridanus Void is. The quote in the original post was copied from Pinterest. I traced its source to the Journal of Cosmology before posting it here. 

The quote is from an academic paper written by Rhawn Joseph, Ph.D. titled “The Infinite Universe vs the Myth of the Big Bang: Red Shifts, Black Holes, Acceleration, Life”. He and some other scientists believe the Eridanus Void is a galaxy-in-galaxy black hole.

Some scientists believe the Eridanus Void is a supervoid. This would help explain an anomalous Cold Spot discovered in 2004 by astronomers studying the cosmic microwave background. (The Cold Spot is very intriguing, for anyone who's interested in cosmic riddles.)

Another theory is that the Eridanus Void is the imprint of a parallel universe.

Some scientists believe our perception of the large "hole" is the result of faulty data--a hiccup in the measurements--and that the Eridanus Void isn't the anomaly it appears to be. New discoveries keep changing the dynamics of the Eridanus Void mystery. Supporters of the Big Bang theory seem to agree the Eridanus Void is connected to the Cold Spot and to significant evidence of the Big Bang.

Valid sources of info I've found:
Staci Stathos's profile photoBryan Grissom's profile photo
Sorry Staci this seems like pseudo science to me and that may come across as offensive.

The parallel universe and galaxy in galaxy black hole ideas are unsubstantiated conjecture.

The void is consistent although improbable with what we expect.

The conjectures need testable proof for us take them seriously.
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His arguments are credible.  
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Aftab khAn

General  - 
The cliffs of comet Churyumov–Gerasimenko

These high cliffs occur on the surface of a comet. They were discovered to be part of the dark nucleus of Comet Churyumov–Gerasimenko (CG) by Rosetta, a robotic spacecraft launched by ESA which began orbiting the comet in early August. The ragged cliffs, as featured here, were imaged by Rosetta about two weeks ago. Although towering about one kilometer high, the low surface gravity of Comet CG would likely make a jump from the cliffs, by a human, survivable. At the foot of the cliffs is relatively smooth terrain dotted with boulders as large as 20 meters across. Data from Rosetta indicates that the ice in Comet CG has a significantly different deuterium fraction – and hence likely a different origin – than the water in Earth’s oceans. The Rosetta spacecraft is scheduled to continue to accompany the comet as it makes its closest approach to the Sun in 2015 August.

Image credit & Licence (CC BY-SA 3.0 IGO): ESA, Rosetta spacecraft, NAVCAM; Additional Processing: Stuart Atkinson
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Notable moment !:
" Rosetta indicates that the ice in Comet CG has a significantly different deuterium fraction – and hence likely a different origin – than the water in Earth’s oceans. "
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Alan Kotok

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Rocket Lab Ltd, a company aiming to make orbital space launches frequent and less costly, says it plans to build a launch site in New Zealand, with completion scheduled by the end of 2015. #Science #Engineering #Business
Rocket Lab, a company aiming to make orbital space launches frequent and less costly, says it plans to build a launch site in New Zealand by the end of 2015.
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Students Aim for Space with 3D-Printed Rocket Engine ... " SAN DIEGO — Years ago, I attended a talk by a number of space luminaries, including Dr. Robert Forward.

Always living up to his name, the famed futurist said that he expected we would grow rockets one day, just like we grow plants. At the time — this was in the 1990s — there was some grumbling and shuffling of feet in the audience. Today, while we might not be quite ready to grow a rocket, how about printing one?

A group of students at the University of California, San Diego, would seem to be on the right track to do so, starting with the rocket's engines. ..."

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а когда я очень давно говорил а 3D  принтер на домной долго смеялись 
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Space exploration through the eyes of women
Sen—The European Space Agency (ESA) has teamed up with international photo journalism agency Sipa Press to highlight the important contribution of women in space exploration and to provide role models for young women thinking of a career in space.
#ISS #samanthacristoforetti #Tereshkova #ESA
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The European Space Agency has teamed up with international photojournalism agency Sipa Press to highlight the important contribution of women in space exploration.
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Samir Dutta

General  - 
William Pomerantz is the Vice President for Special Projects at Virgin Galactic. In this TEDx talk he passionately answers the question, “Why go to outer space?” and takes us on a tour of the positive impacts of space exploration and the understanding it's given us of our planet. You won’t wan...
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