Discovering Astronomy
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Discovering Astronomy
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Eyes on Earth: The ISS HD Earth Viewing Experiment | I Fucking Love Science

Eyes on Earth: The ISS HD Earth Viewing Experiment | I Fucking Love Science | Discovering Astronomy | Scoop.it
One of the latest missions from the ISS is kind of amazing. The High Definition Earth Viewing (HDEV) experiment consists of four cameras that have been attached outside of the ISS. Though temperature is controlled, the cameras are exposed to the radiation from the sun, which will allow astronauts to understand how radiation affects the instruments.
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Watch the live stream ! Earth seen from ISS !

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Des astronomes ont découvert la galaxie la plus lointaine jamais observée depuis la Terre

Des astronomes ont découvert la galaxie la plus lointaine jamais observée depuis la Terre | Discovering Astronomy | Scoop.it
Sa lumière a mis environ 13,1 milliards d'années pour atteindre le télescope spatial Hubble...
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APOD: 2014 January 5 - Galaxy NGC 474: Shells and Star Streams

APOD: 2014 January 5 - Galaxy NGC 474: Shells and Star Streams | Discovering Astronomy | Scoop.it

Explanation: What's happening to galaxy NGC 474? The multiple layers of emission appear strangely complex and unexpected given the relatively featureless appearance of the elliptical galaxy in less deep images. The cause of the shells is currently unknown, but possibly tidal tails related to debris left over from absorbing numerous small galaxies in the past billion years. Alternatively the shells may be like ripples in a pond, where the ongoing collision with the spiral galaxy just above NGC 474 is causing density waves to ripple though the galactic giant. Regardless of the actual cause, the above image dramatically highlights the increasing consensus that at least some elliptical galaxies have formed in the recent past, and that the outer halos of most large galaxies are not really smooth but have complexities induced by frequent interactions with -- and accretions of -- smaller nearby galaxies. The halo of our own Milky Way Galaxy is one example of such unexpected complexity. NGC 474 spans about 250,000 light years and lies about 100 million light years distant toward the constellation of the Fish (Pisces).

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Image Credit & Copyright: P.-A. Duc (CEA, CFHT), Atlas 3D Collaboration

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Top 5 Space Stories of 2013! - The Countdown #38 - YouTube

We rounded up the coolest, biggest and most important space stories of 2013 and asked the editors of Scientific American to vote for their top five. Here they are in our latest episode of the Countdown.

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Let's hope 2014 will be as exciting as 2013 !

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APOD: 2013 December 23 - Géminides au Chili

APOD: 2013 December 23 - Géminides au Chili | Discovering Astronomy | Scoop.it
La pluie annuelle d'étoiles filantes des
Géminides est tombée il y a une dizaine de jours, comme en témoigne ce paysage
céleste immortalisé dans la nuit du 13 au 14 décembre du côté de
l'observatoire de Las Campanas au
Chili.
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La version française d'Astronomy Picture of the Day !

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Science, Religion, and the Big Bang

Support MinutePhysics and MinuteEarth on Subbable - http://www.subbable.com/minuteearth AND http://www.subbable.com/minutephysics MinutePhysics is on Google+...
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The Big Bang VS the Everywhere strech

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APOD: 2013 July 20 - Comet Lemmon and the Deep Sky

APOD: 2013 July 20 - Comet Lemmon and the Deep Sky | Discovering Astronomy | Scoop.it

Comet Lemmon and the Deep Sky 
Image Credit & Copyright: Nick Martin

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Explanation: Now sweeping high above the ecliptic plane, Comet Lemmon has faded dramatically in planet Earth's night sky as it heads for the outer solar system. Some 16 light-minutes (2 AU) from the Sun, it still sports a greenish coma though, posing on the right in this 4 degree wide telescopic view from last Saturday with deep sky star clusters and nebulae in Cassiopeia. In fact, the rich background skyscape is typical within the boundaries of the boastful northern constellation that lie along the crowded starfields of the Milky Way. Included near center is open star cluster M52 about 5,000 light-years away. Around 11,000 light-years distant, the red glowing nebula NGC 7635 below and left of M52 is well-known for its appearance in close-up images as the Bubble Nebula. But the fading Comet Lemmon is not the only foreground object on the scene. A faint streak on the right is an orbiting satellite caught crossing through the field during the long exposure, glinting in the sunlight and winking out as it passes into Earth's shadow.

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APOD: 2013 July 10 - Large Sunspots Now Crossing the Sun

APOD: 2013 July 10 - Large Sunspots Now Crossing the Sun | Discovering Astronomy | Scoop.it
A different astronomy and space science
related image is featured each day, along with a brief explanation.

Image Credit & Copyright: Damian Peach

Sophie Boutefroy's insight:

Explanation: One of the largest sunspot regions in recent years is now crossing the Sun. This region of convoluted magnetic fields may well produce a solar flare that releases a cloud of energetic particles into the Solar System. Were a very powerful cloud to impact the Earth's magnetosphere, it could be dangerous to Earth-orbiting astronauts and satellites. Conversely, the impact of even a less energetic cloud might create picturesque aurora. Pictured above is the sunspot region as it appeared two days ago. The rightmost part of this region has been cataloged as AR 11785, while the left part as AR 11787. The darkest sunspot regions contain nearly vertical magnetic fields and are called umbras, while the surrounding bronze regions -- more clearly showing stringy magnetic flux tubes -- are called penumbras. Churning solar granules, many about 1000 km across, compose the yellow background region. No one knows what this sunspot region will do, but space weather researchers are monitoring it closely.

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APOD: 2013 July 3 - Stars and Lightning Over Greece

APOD: 2013 July 3 - Stars and Lightning Over Greece | Discovering Astronomy | Scoop.it

Image Credit & Copyright: Bill Metallinos

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Explanation: It may appear, at first, like the Galaxy is producing the lightning, but really it's the Earth. In the foreground of the above picturesque nighttime landscape is the Greek Island of Corfu, with town lights surrounding Lake Korrision. Visible farther in the distance are lights from the town of Preveza on the Greek mainland. In the more distant sky a thunderstorm is threatening, with two lightning strokes caught together during this 45 second wide-angle exposure taken in mid-May. The lightning branch on the left appears to be striking near Preveza, whereas the lightning strike on the right appears to be striking near Mount Ainos on the Greek Island of Cephalonia. Much farther in the distance, strewn about the sky, are hundreds of stars in the neighborhood of our Sun in the Milky Way Galaxy. Furthest away, arching over the entire panorama, are billions of starsthat together compose the central band of our Milky Way.

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Mega Galaxy Merger

This simulation shows the merging of two massive galaxies, sped up to cover 1.5 billion years of time. The merging galaxies are split into two views: a visib...
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Curiosity Rover Report (May 9, 2013): 'Spring Break' Over: Commanding Resumes

Curiosity gets new software and new capabilities for the long trek to Mt. Sharp.
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Curiosity is back to work !

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Un Univers naissant pas tout à fait homogène | Slate

Un Univers naissant pas tout à fait homogène | Slate | Discovering Astronomy | Scoop.it
Le 21 mars 2013, on s'attendait à des révélations sur la naissance de l'Univers avec la publication par l'Agence spatiale européenne (ESA) des premiers résultats issus des mesures effectuées par le satellite Planck.
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What's Up for May 2014 - YouTube

Partagez vos vidéos avec vos amis, vos proches et le monde entier
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What's up for May? Great views of Saturn & Mars, plus a possible new meteor shower.

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Curiosity Rover Report (Feb. 14, 2014): Rover's 5K Run - YouTube

Curiosity logs 5K after a punishing trek over sharp terrain. To celebrate, JPLers put on their running shoes!
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Curiosity rover does all her own stunts on Mars, but has a double on Earth to figure out how to minimize wear.

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What's Up for January 2014 - YouTube

Jupiter at opposition. Venus at conjunction. A Juno mission update. And the Quadrantid meteor shower.

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APOD: 2013 December 28 - Alaska Aurora Sequence

APOD: 2013 December 28 - Alaska Aurora Sequence | Discovering Astronomy | Scoop.it

Explanation: A remarkably intense auroral band flooded the northern night with shimmering colors on December 7. The stunning sequence captured here was made with a camera fixed to a tripod under cold, clear skies near Ester, just outside of Fairbanks, Alaska. Left to right, spanning a period of about 30 minutes, the panels follow changes in the dancing curtains of northern lights extending to altitudes of over 100 kilometers in a band arcing directly overhead. The panels span 150 degrees vertically, covering about 500 kilometers of aurora laying across the sky from edge to edge. The auroral activity was triggered by a moderate level geomagnetic storm, as a high speed solar wind stream buffeted planet Earth's magnetosphere.

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Image Credit & Copyright: LeRoy Zimmerman (TWAN)

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APOD: 2013 December 25 - Phobos 360

Explanation: What does the Martian moon Phobos look like? To better visualize this unusual object, images from ESA's Mars Express orbiter have been combined into a virtualrotation movie. The rotation is actually a digital illusion -- tidally-locked Phobos always keeps the same face toward its home planet, as does Earth's moon. The above video highlights Phobos' chunky shape and an unusually dark surface covered with craters and grooves. What lies beneath the surface is a topic of research since the moon is not dense enough to be filled with solid rock. Phobos is losing about of centimeter of altitude a year and is expected to break up and crash onto Mars within the next 50 million years. To better understand this unusual world, Mars Express is on course to make the closest flyby ever on Sunday.

 

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Click on the title to watch the video. Video Credit: Mars Express, ESA

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3 Simple Ways to Time Travel (& 3 Complicated Ones)

Thanks to Volkswagen for supporting this video - http://vwoa.us/160kehn And check out Aatish Bhatia's excellent physics blog - http://www.empiricalzeal.com/ ...
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Did you know that your feet are a tiny tiny bit younger than your head ?

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Do We Expand With The Universe?

Help support MinuteEarth - http://subbable.com/minuteearth MinutePhysics is on Google+ - http://bit.ly/qzEwc6 And facebook - http://facebook.com/minutephysic...
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Curiosity Rover Report (July 11, 2013): Trek to Mount Sharp Begins

NASA's Mars rover Curiosity heads on the long journey to the mission's main destination, Mount Sharp.
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APOD: 2013 July 4 - M82: Starburst Galaxy with a Superwind

APOD: 2013 July 4 - M82: Starburst Galaxy with a Superwind | Discovering Astronomy | Scoop.it

Image Credit & Copyright: Ken Crawford (Rancho Del Sol Obs.)

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Explanation: Also known as the Cigar Galaxy for its elongated visual appearance, M82 is a starburst galaxy with a superwind. In fact, through ensuing supernova explosions and powerful winds from massive stars, the burst of star formation in M82 is driving a prodigious outflow of material. Evidence for the superwind from the galaxy's central regions is clear in this sharp telescopic snapshot. The composite image highlights emission from long outflow filaments of atomic hydrogen gas in reddish hues. Some of the gas in the superwind, enriched in heavy elements forged in the massive stars, will eventually escape into intergalactic space. Including narrow band image data in the deep exposure has revealed a faint feature dubbed the cap. Perched about 35,000 light-years above the galaxy at the upper left, the cap appears to be galactic halo material ionized by the superwind shock or intense ultraviolet radiation from the young, massive stars in the galaxy's core. Triggered by a close encounter with nearby large galaxy M81, the furious burst of star formation in M82 should last about 100 million years or so. M82 is 12 million light-years distant, near the northern boundary of Ursa Major.

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Radar Reveals Asteroid 1998 QE2 has a Moon

Radar data of asteroid 1998 QE2 obtained on May 29, 2013, when the asteroid was about 3.75 million miles (6 million kilometers) from Earth. 1998 QE2 measures...
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[INFOGRAPHIE] Regardez les météorites s'écraser sur la Terre | Slate

[INFOGRAPHIE] Regardez les météorites s'écraser sur la Terre | Slate | Discovering Astronomy | Scoop.it
Il est important de garder à l’esprit que nous n’avons qu’une chance sur plus de 74 millions de mourir d’un impact d’astéroïde. Maintenant, vous pouvez écarquiller les yeux devant Bolides, l’animation de Carlo Zapponi...
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Appel à volontaires assez fous pour prendre un aller simple pour Mars

Appel à volontaires assez fous pour prendre un aller simple pour Mars | Discovering Astronomy | Scoop.it
Mars One, société hollandaise à but non-lucratif, a invité lundi des volontaires à soumettre leur candidature pour un aller simple vers la planète...
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