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This Week’s Night Sky: Moon Turns to Blood
A lunar eclipse will dazzle sky-watchers in the western half of North America.
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Jay Cross

Astronomy  - 
 
Astronomy Papers That Caught My Eye In Today's arXiv

There are 59 papers today (Wednesday), not counting replacements. There were quite a few papers on the slowing of the rotation of magnetars.

Topics: Metalicity & SN at z=1.49, Nova Ejecta, Making a Star Cluster

Metalicity & SN at z-1.49 http://arxiv.org/abs/1503.08822 Galaxies seem to have started out getting lots of metals in their cores and more slowly spreading that higher metal/Hydrogen ratio to the outer spiral arms over time. This is pretty difficult to measure at the moment. Bright light sources where we can see absorption lines are needed, but at z>1 not much is bright. Someday the E-ELT and similar telescopes will be able to just look and see supernovae at such distances, but for now, we have to wait for rare lensed supernovae, and this paper is about one such SN, and the galactocentric metalicity gradient for one face-on spiral galaxy at z=1.49.

Nova Ejecta http://arxiv.org/abs/1503.08840 Recurrent Nova T Pyxidis was observed erupting six times since 1890 and probably erupted once around 1866, but that 1866 eruption may have been the first, or at least the first after millenia of being quiet. We know this because when it erupted in 2011, Hubble was used periodically to check on how the light from that eruption reionized knots of material from the previous eruptions. This paper tells the story, and shows the images of the light echos.

Making a Star Cluster http://arxiv.org/abs/1503.09037 S254-S258 OB Complex is a large infrared dark cloud with interior filaments about 8000 light years from here. It contains many protostars and young stellar objects., and is showing us what an open cluster looks like before it is done being made. From this example we can see one instance of how efficient and rapid the process of forming stars is. It is currently forming about 30 solar masses of stars every million years.
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An article published in the journal "Astronomy & Astrophysics" describes the results of a research carried out by combining the observations made with ESA's Herschel and Planck space telescopes. The purpose was to find protoclusters, the precursors of today's galaxy clusters seen in the distant past when the universe was only three billion years. This will help to understand how these huge groups of tens, hundreds and even thousands of galaxies formed and evolved.
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Earth-like 'Tatooine' planets may orbit many double stars
Complex mathematical simulations suggest that rocky Earth-like planets are likely to exist around binary stars and may be widespread, despite the fact that up until now only uninhabitable gas-giant planets have been identified in such systems. 
#Exoplanets #BinaryStars #tatooine
Read the full article at: http://sen.com/news/earth-like-tatooine-planets-may-orbit-many-double-stars
Complex mathematical simulations suggest that rocky Earth-like planets are not only likely to exist around binary stars, but may in fact be widespread, despite the fact that up until now only uninhabitable gas-giant planets have been identified in such systems.
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were identified as similar to the planet earth, but they have ten times the weight.
In terms of habitability are unacceptable because of the weight :)
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Most galaxies have at their cores a supermassive black hole hundreds of millions of times the mass of our Sun.  They emit powerful ultraviolet radiation from the  supermassive black hole at the core of the host galaxy.

The most active of these galaxy cores are called quasars, where infalling material is heated to a point where a brilliant searchlight shines into deep space. The beam is produce by a disk of glowing, superheated gas encircling the black hole.

Please join +Tony Darnell Dr. +Carol Christian and +Scott Lewis as they discuss some fascinating new observations of quasars made by the Hubble Space Telescope
This Hangout On Air is hosted by Hubble Space Telescope. The live video broadcast will begin soon.
Q&A
Preview
Live
Quasars and Active Galactic Nuclei
Tomorrow, April 2, 3:00 PM
Hangouts On Air - Broadcast for free

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Tammy Gordin

Astronomy  - 
 
 
Zooming into the Cone Nebula by Astro Anarchy
Resembling a nightmarish beast rearing its head from a crimson sea, this monstrous object is actually a pillar of gas and dust. Called the Cone Nebula because of its conical shape in ground-based images, this giant pillar resides in a turbulent star-forming region. Taken by the Hubble Space Telescope in April 002, this image shows the upper 2.5 light-years of the nebula, a height that equals 23 million round trips to the moon. The entire nebula is 7 light years in length. The Cone Nebula resides 2,500 light-years away in the constellation Monoceros.
#galactica #nebula #cosmos #nasa #enjoyyourtime  
astroanarchy.zenfolio.com
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Encore un autre tableau celeste dont l'assortiment des couleurs et sujets que nul peintre ne peut imaginer 
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Tammy Gordin

Astronomy  - 
 
 
Thor’s Helmet Nebula                                                                                                                                                                                                                             Name: NGC 2359
Type: • Milky Way : Star : Type : Wolf-Rayet
• Milky Way : Nebula : Type : Star Formation
• X - Nebulae
Distance: 15000 
Constellation: Canis Major
Credit:
ESO/B. Bailleul                                                                                                                                                                                                                                                                                                                                                                          https://plus.google.com/u/0/+РоманРубцовХОР/posts     
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Great shot thanks for sharing
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Обсерватория солнечной динамики (SDO) делает снимки Солнца примерно каждые 10 секунд, поэтому ей не составила труда сделать снимок нашего светила, когда календарь и часы выстроились в завораживающее сочетание 11/11/11 11:11.
Что гармонично прилипло к заворажевающему фото нашего светила.

#космос   #солнце  
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cosmiclettuce

Astronomy  - 
 
The need for Professional-Amateur collaborations in studies of Jupiter and Saturn

http://arxiv.org/abs/1503.07878
Abstract: The observation of gaseous giant planets is of high scientific interest. Although they have been the targets of several spacecraft missions, there still remains a need for continuous ground-based observations. As their atmospheres present fast dynamic environments on various time ...
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Typhoon Maysak strengthened into a super typhoon on March 31, reaching Category 5 hurricane status on the Saffir-Simpson Wind Scale. ESA Astronaut Samantha Cristoforetti captured this image while flying over the weather system on board the International Space Station. The Tropical Rainfall Measuring Mission (TRMM) and Global Precipitation Measurement (GPM) satellites, both co-managed by NASA and the Japan Aerospace Exploration Agency, captured rainfall and cloud data that revealed heavy rainfall and high thunderstorms in the strengthening storm. The TRMM satellite has been collecting valuable scientific data since November 1997. Early on March 30, the satellite collected rainfall data as it flew directly above Maysak at 04 14 UTC (12 14 a.m. EDT) when maximum sustained winds were near 85 knots (98 mph). Rainfall data was collected by TRMM's Microwave Imager (TMI) and Precipitation Radar (PR) instruments and showed heaviest rainfall southwest of the center, and in fragmented bands of thunderstorms northeast of the center. In both of those places rainfall was in excess of 50 mm/2 inches per hour. More information.
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Beautiful.
 
Life on a farm

This is how we live - Yes, I know and understand that I am a lucky guy :-)

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Brian Flanagan

Astronomy  - 
 
BURSTS of radio waves flashing across the sky seem to follow a mathematical pattern. If the pattern is real, either some strange celestial physics is going on, or the bursts are artificial, produced by human – or alien – technology.

Telescopes have been picking up so-called fast radio bursts (FRBs) since 2001. They last just a few milliseconds and erupt with about as much energy as the sun releases in a month. Ten have been detected so far, most recently in 2014, when the Parkes Telescope in New South Wales, Australia, caught a burst in action for the first time. The others were found by sifting through data after the bursts had arrived at Earth. No one knows what causes them, but the brevity of the bursts means their source has to be small – hundreds of kilometres across at most – so they can't be from ordinary stars. And they seem to come from far outside the galaxy.

The weird part is that they all fit a pattern that doesn't match what we know about cosmic physics.

http://bit.ly/1Ez4VOM
Mysterious radio wave flashes from far outside the galaxy are proving tough for astronomers to explain. Is it pulsars? A spy satellite? Or an alien
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interesting 
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Cloud .Tube

Astronomy  - 
 
On Saturday morning, April 4th, sky watchers in the USA can see a brief but beautiful total eclipse of the Moon.
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Èyè faraj

Astronomy  - 
 
The planet Jupiter was visible on the night of December 25, 2012 as a small dot next to the natural satellite. The phenomenon lasted a few minutes.
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A reader wrote in to ask how much time we have before we crash into the Andromeda Galaxy
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Do we need seatbelts?
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Jay Cross

Astronomy  - 
 
Astronomy Papers That Caught My Eye In Today's arXiv

There are 71 papers today (Tuesday), not counting replacements. 

Topics: Early Dust, DIOS, Hard State Jets

Early Dust http://arxiv.org/abs/1503.08210 There was a lot of dust at z=7. How did it form before 850 million years after the big bang? Measurements have been made of the amount of dust, and of the number of Asymptotic Giant Branch stars in these early galaxies, and it is pretty clear that the stars didn't contribute a large fraction to the dust. So, what else could have contributed at this early epoch? There is some room for speculation.

DIOS http://arxiv.org/abs/1503.08405 The Diffuse Intergalactic Oxygen Surveyor is a Japanese (JAXA) mission scheduled to launch around 2020. It is designed for doing high resolution x-ray spectroscopy especially looking for very highly ionized Oxygen, with the intent of tracing gar dynamics over a wide range of scales. There is a potential here to observe the direction of flow of materials that have until now been invisible.

Hard State Jets http://arxiv.org/abs/1503.08634 MAXI J1836-194 is a stellar mass black hole candidate that was discovered a few years ago (2011). This object was discovered because of a jet producing outburst, and the behavior of the jets was unusual, in that they have stayed energetic. These jets have been observed and monitored with a number of the best radio facilities on the planet, and this paper takes a look at what was seen, and what is implied by these observations.
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This view in the southern constellation of Ara (The Altar) is a treasure trove of celestial objects. Star clusters, emission nebulae and active star-forming regions are just some of the riches observed in this region lying some 4000 light-years from Earth. This beautiful new image is the most ...
This view in the southern constellation of Ara (The Altar) is a treasure trove of celestial objects. Star clusters, emission nebulae and active star-forming regions are just some of the riches observed in this region lying some 4000 light-years from Earth. This beautiful new image is the most ...
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Luke Skywalker’s home in “Star Wars” is the desert planet Tatooine, with twin sunsets because it orbits two stars. So far, only uninhabitable gas-giant planets have been identified circling such binary stars, and many researchers believe rocky planets cannot form there. Now, mathematical simulations show that Earth like, solid planets such as Tatooine likely exist and may be widespread.

“Tatooine sunsets may be common after all,” concludes the study by astrophysicists Ben Bromley of the University of Utah and Scott Kenyon of the Smithsonian Astrophysical Observatory.

“Our main result is that outside a small region near a binary star, [either rocky or gas-giant] planet formation can proceed in much the same way as around a single star,” they write. “In our scenario, planets are as prevalent around binaries as around single stars.”
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Mehwish Moiz

Astronomy  - 
 
 
the orion nebula as seen from the hubble telescope a nebula is a cosmic cloud made of dust and hidrogen and other elements this one is the size of thousands of galaxies
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