1. 14:00 21st Sep 2014

    notes: 136

    reblogged from: theliquid-summer

    tags: astronomy2013

    theliquid-summer:

    Gallifrey falls no more. Seriously, can we starts a petition to call this planet Gallifrey?

     
  2. 09:49 9th Sep 2014

    notes: 785

    reblogged from: heythereuniverse

    tags: astronomyblack hole

    image: download

    heythereuniverse:

A Ring of Black Holes | NASA’s Marshall Space Flight Center

Composite image of Arp 147, a pair of interacting galaxies located about 430 million light years from Earth. Arp 147 contains the remnant of a spiral galaxy (right) that collided with the elliptical galaxy on the left. This collision has produced an expanding wave of star formation that shows up as a blue ring containing in abundance of massive young stars. These stars race through their evolution in a few million years or less and explode as supernovas, leaving behind neutron stars and black holes. (more)

    heythereuniverse:

    A Ring of Black Holes | NASA’s Marshall Space Flight Center

    Composite image of Arp 147, a pair of interacting galaxies located about 430 million light years from Earth. Arp 147 contains the remnant of a spiral galaxy (right) that collided with the elliptical galaxy on the left. This collision has produced an expanding wave of star formation that shows up as a blue ring containing in abundance of massive young stars. These stars race through their evolution in a few million years or less and explode as supernovas, leaving behind neutron stars and black holes. (more)

     
  3. 10:46 3rd Sep 2014

    notes: 98

    reblogged from: m1k3y

    tags: astronomystar

    warrenellis:

    "An ancient star a mere thousand light-years from Earth bears chemical elements that may have been forged by the death of a star that was both extremely massive and one of the first to arise after the big bang. If confirmed, the finding means that some of the universe’s first stars were so massive they died in exceptionally violent explosions that altered the growth of early galaxies."

     
  4. 09:18 1st Sep 2014

    notes: 50830

    reblogged from: rosemaryandthorn

    tags: astronomystar

    estufar:

actual headline from The New York Times in 1919

    estufar:

    actual headline from The New York Times in 1919

     
  5. 11:36 30th Aug 2014

    notes: 85

    reblogged from: m1k3y

    tags: astronomyextrasolar meteorology

    m1k3y:

    "It’s tentative," he says, but "it’s the first evidence for water clouds" outside our solar system. Even within the solar system, observers can see water clouds on only Earth and Mars; the giant planets are so cold that ammonia ice clouds cover the water clouds on Jupiter and Saturn while the atmospheres of Uranus and Neptune block the view there.

    Observers have previously discerned water vapor in the atmospheres of extrasolar planets, but Fortney says water clouds are a new phenomenon. “One of the things we don’t really know is how common partly cloudiness is,” he says. Venus, whose clouds consist of sulfuric acid, is totally cloudy, whereas Earth is partly cloudy. Faherty says the brown dwarf is also partly cloudy: About half is obscured by clouds.

    Verifying the discovery will require spectra. Because the object is so dim, this will likely await the James Webb Space Telescope, which will be launched later this decade.

     
  6. 09:06 28th Aug 2014

    notes: 173

    reblogged from: rosemaryandthorn

    tags: astronomyNeptuneTriton

    image: download

    minus229k1:

Meet Triton, Neptune’s innermost and weirdest moon.Paul Schenk lately completed the best map so far of the moon, with the help of NASA’s Voyager 2,which passed by the last “real” planet in 1989, the map was actualized and now gives the best view of Triton we’ve ever had.
Read more about the project here:
http://spaceref.com/neptune/voyager-map-details-neptunes-strange-moon-triton.html
Found at #Planetary Landscapes’ FB.

    minus229k1:

    Meet Triton, Neptune’s innermost and weirdest moon.
    Paul Schenk lately completed the best map so far of the moon, with the help of NASA’s Voyager 2,which passed by the last “real” planet in 1989, the map was actualized and now gives the best view of Triton we’ve ever had.

    Read more about the project here:

    http://spaceref.com/neptune/voyager-map-details-neptunes-strange-moon-triton.html

    Found at #Planetary Landscapes’ FB.

     
  7. A Spacecraft for All: 

    • Launched in 1978 and originally tasked with studying the outer reaches of the Earth’s magnetosphere, the International Sun/Earth Explorer 3 (ISEE-3) probe was given a second mission in the 1980s of chasing comets before being shut down in 1997.
    • It was determined to be possible to reactivate the spacecraft in 2014, when it again made a close approach to Earth, and scientists discussed reusing the probe to observe more comets. However, NASA was no longer interested in recovering the spacecraft because of the limitations of its present budgets.
    •  A group of space enthusiasts began to talk. Retired and active aerospace engineers began to exchange ideas with avid HAM radio operators around the world.  Finally, one group took charge. They made a agreement with NASA to have the rights to use ISEE-3 for the benefit of citizen science and obtained the old documentation.  
    • In May 2014, the ISEE-3 Reboot Project raised more than $150,000 with crowdfunding. Some original NASA engineers and various experts offered their help. The group gathered old equipment in their headquarters, an abandoned McDonald’s (they call it McMoons). After a lot of work and trial and error, two-way communication was achieved and ISEE-3 truly became ISEE-3 Reboot. 
    • The ultimate goal was to command the spacecraft to fire its rocket engines to change its trajectory and become captured by the Earth’s gravitational field.  On July 2, the reboot project fired the thrusters for the first time since 1987. They spun up the spacecraft to its nominal roll rate, in preparation for the upcoming trajectory correction maneuver in mid-July. On July 8, a longer sequence of thrusters firings failed, apparently due to a loss of the nitrogen gas used to pressurize the fuel tanks
    • On July 24, the ISEE-3 Reboot Team announced that all attempts to change orbit using the ISEE-3 propulsion system had failed. Instead, the team said, the ISEE-3 Interplanetary Citizen Science Mission would gather data as the spacecraft flies by the Moon on August 10 and enters a heliocentric orbit similar to Earth’s. 
    • Google Creative Labs documented the adventure and created the compendium which was delivered to the public domain last week, A Spacecraft for All

    I tried to summarize the main events of this great technical adventure. The details are interesting. I invite you to visit the google site and to read more: 

    my sources: gizmag (good article) and wikipedia

    The ISEE-3 Reboot blog: spacecollege.org/isee3/

     

     
  8. 13:18 10th Aug 2014

    notes: 451

    reblogged from: equinoxparanormal

    tags: astronomymoonmeteor

    image: download

    equinoxparanormal:

Supermoon On August 10 Will Be Biggest Of 2014
There’s going to be an extra-special moon this weekend.
On Aug. 10, when the moon turns full at 2:10 p.m. EDT, skywatchers will be treated to the sight of a so-called “supermoon” — and it will be the largest supermoon of the year.
The phenomenon — any full moon that coincides with the time in the moon’s orbitwhen it’s closest to Earth — should be visible on Sunday night after sunset.
Head over to the U.S. Naval Observatory’s website to check local times for the supermoon in your area.
How spectacular will this supermoon be?
In comparison to other full moons, supermoons can be up to 14 percent closer and 30 percent brighter, according to NASA. In addition, the August 2014 supermoon will become full during the same hour that the moon comes closest to the Earth (lunar perigee), meaning it will outshine other full moons that have fallen on the same day as the lunar perigee.
The August supermoon may also pair nicely with the Perseid meteor shower, which should be visible this weekend when Earth passes through the debris zone left byComet Swift–Tuttle. The Perseids, which may offer skywatchers a view of 100 shooting stars per hour, will peak between Aug. 10 and Aug. 13.
This year was an exceptional one for supermoons, with three appearing in a row —one each in July, August and September. The next supermoon will fall on September 9, 2014.
[Sara Gates, The Huffington Post]

    equinoxparanormal:

    Supermoon On August 10 Will Be Biggest Of 2014

    There’s going to be an extra-special moon this weekend.

    On Aug. 10, when the moon turns full at 2:10 p.m. EDT, skywatchers will be treated to the sight of a so-called “supermoon” — and it will be the largest supermoon of the year.

    The phenomenon — any full moon that coincides with the time in the moon’s orbitwhen it’s closest to Earth — should be visible on Sunday night after sunset.

    Head over to the U.S. Naval Observatory’s website to check local times for the supermoon in your area.

    How spectacular will this supermoon be?

    In comparison to other full moons, supermoons can be up to 14 percent closer and 30 percent brighter, according to NASA. In addition, the August 2014 supermoon will become full during the same hour that the moon comes closest to the Earth (lunar perigee), meaning it will outshine other full moons that have fallen on the same day as the lunar perigee.

    The August supermoon may also pair nicely with the Perseid meteor shower, which should be visible this weekend when Earth passes through the debris zone left byComet Swift–Tuttle. The Perseids, which may offer skywatchers a view of 100 shooting stars per hour, will peak between Aug. 10 and Aug. 13.

    This year was an exceptional one for supermoons, with three appearing in a row —one each in July, August and September. The next supermoon will fall on September 9, 2014.

    [Sara Gates, The Huffington Post]

     
  9. 09:43 25th Jul 2014

    notes: 461

    reblogged from: thegetty

    tags: moonastronomyhistory

    thegetty:

    The moon was visible, yet unreachable by keen astronomers like John herschel in the late 19th century. This photograph is actually of a detailed papier-mâché model of a moon crater. 

    Moon Crater, late 1850s, Unknown. J. Paul Getty Museum.

     
  10. Screenshots from Universe Sandbox, currently a part of the Humble Weekly Bundle until July 24, pay what you want for it (available as a direct  download or Steam key, for Windows only).  With this simulator you can see the solar system in 3D from multiple point of views, see each planet with its moons, change the mass of any element, add an element (a planet, a moon, an asteroid), observe a collision, create your own system and more.  More than 70 simulations are included, like a 3d map of the constellations and the passage of Voyager II near neptune in 1989.  

    You can see videos on youtube, like this one, and there is a demo available.