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The Daily Cosmos or Interesting Facts about the Universe

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The Daily Cosmos or Interesting Facts about the Universe

Cosmology
Astrophysics
Astronomy

Location: #science
Members: 57
Latest Activity: yesterday

 

Cosmology - Astrophysics - Astronomy

 

Hubble Wallpaper - Awesome Hubble Images

Discussion Forum

Big Bangers' Imaginations Supply Their Story's Only Support.

Started by Tom Sarbeck. Last reply by Joey Daniel Smith Dec 22, 2018. 7 Replies

'Hot Jupiter'

Started by Mrs.B. Last reply by Mrs.B Apr 9, 2016. 7 Replies

NASA's Solomon's Choice.

Started by Davy Oct 3, 2013. 0 Replies

This is Science at Work.

Started by Davy. Last reply by Davy Aug 15, 2013. 1 Reply

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Comment by Doone on March 29, 2011 at 7:10pm

See Explanation. Clicking on the picture will download the highest resolution version available.

Kepler's Suns and Planets 
Illustration Credit: Jason Rowe, Kepler Mission

Explanation: Using the prolific planet hunting Kepler spacecraft, astronomers have discovered 1,235 candidate planets orbiting other suns since the Kepler mission's search for Earth-like worlds began in 2009. To find them, Kepler monitors a rich star field to identify planetary transits by the slight dimming of starlight caused by a planet crossing the face of its parent star. In this remarkable illustration, all of Kepler's planet candidates are shown in transit with their parent stars ordered by size from top left to bottom right. Simulated stellar disks and the silhouettes of transiting planets are all shown at the same relative scale, with saturated star colors. Of course, some stars show more than one planet in transit, but you may have to examine the picture at high resolution to spot them all. For reference, the Sun is shown at the same scale, by itself below the top row on the right. In silhouette against the Sun's disk, both Jupiter and Earth are in transit.

Comment by Doone on March 29, 2011 at 7:09am

From Today's Start with a Bang

 

The Hyades is out of B-stars, but contains many more A-stars and F-stars than our neighborhood does; it even contains 8 white dwarf stars, which are the corpses of B-stars that weren't quite massive enough to make it to a supernova!

At 625 million years, it's an oldie but a goodie. And at just 151 light-years away, it might be an ideal place to find a young world to colonize someday! But you'd better move fast, because these stars won't stay bound together for long. Why not? Break out your red/green 3-D glasses if you've got them, because you'll want to see this animation.

Astro_4D_hyades_rg_anim.gif

(Image credit: Alexander Meleg.)

The Hyades are flying apart! Open star clusters don't live very long because, when you get a large number of massive objects together like that, gravitational interactions periodically kick stars out, eventually dissipating the cluster and just leaving a large number of mostly single, binary or trinary star systems. But for right now, there are hundreds of them pretty tightly packed together, including an unusual concentration of stars more massive than our

Comment by Adriana on March 28, 2011 at 3:13pm

Image of the Day: One Trillion Stars! Andromedea Galaxy in Infrared...

  M31-irac_cx38

The detailed Spitzer Space Telescope view above features infrared light from dust (red) and old stars (blue) in Andromeda, a massive spiral galaxy a mere 2.5 million light-years away. In fact, with over twice the diameter of our own Milky Way, Andromeda is the largest nearby galaxy. Andromeda's population of bright young stars define its sweeping spiral arms in visible light images, but here the infrared view clearly follows the lumpy dust lanes heated by the young stars as they wind even closer to the galaxy's core. Constructed to explore Andromeda's infrared brightness and stellar populations, the full mosaic image is composed of about 3,000 individual frames. Two smaller companion galaxies, NGC 205 (below) and M32 (above) are also included in the combined fields. The data confirm that Andromeda (aka M31) houses around 1 trillion stars, compared to 4 hundred billion for the Milky Way.

The Chandra X-ray image below shows the central portion of the Andromeda Galaxy. The blue dot in the center of the image is an unusually "cool" million degree X-ray source of unknown nature. Just above this cool source is a source (yellow) that is thought to be due to X-rays from matter swirling toward a supermassive black hole in the nucleus of the galaxy. This black hole contains the mass of 30 million suns. Numerous other X-ray sources are also apparent. Most of these are probably due to X-ray binary systems, in which a neutron star or black hole is in a close orbit around a normal star.

M31_xray_ir

NASA Spitzer and Chandra Space Telescopes  http://chandra.harvard.edu/photo/2000/0007/

Comment by Doone on March 27, 2011 at 10:41pm

Click to see a few hundred small thumbnail images from Hubble
Hubble WallPaper - Another AU Page

 

Comment by Michel on March 27, 2011 at 11:31am
Brown Dwarf Or Gas Giant Planet?
Comment by Doone on March 27, 2011 at 5:31am

See Explanation. Clicking on the picture will download the highest resolution version available.

Valles Marineris: The Grand Canyon of Mars 
Credit: Viking ProjectUSGSNASA

Explanation: The largest canyon in the Solar System cuts a wide swath across the face of Mars. Named Valles Marineris, the grand valley extends over 3,000 kilometers long, spans as much as 600 kilometers across, and delves as much as 8 kilometers deep. By comparison, the Earth's Grand Canyon in Arizona, USA is 800 kilometers long, 30 kilometers across, and 1.8 kilometers deep. The origin of the Valles Marineris remains unknown, although a leading hypothesis holds that it started as a crack billions of years ago as the planet cooled. Several geologic processes have been identified in the canyon. The above mosaic was created from over 100 images of Mars taken by Viking Orbiters in the 1970s.

Comment by Jean Marie on March 25, 2011 at 1:42am

yet another amazing video from the link off of Radu's page:

 

Comment by Jean Marie on March 25, 2011 at 1:28am

i just swiped this awesome video off of Radu's page, fascinating, i smiled all the way from first moment to last:

Comment by Michel on March 24, 2011 at 1:44pm

WOW! Sun Eruption Creates Spectacular Plasma Tentacle

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A NASA spacecraft watching the sun has caught a dazzling view of a solar eruption that launched a vast tendril of magnetic plasma into space.

NASA's Solar Dynamics Observatory recorded the sun tentacle, which scientists call a solar prominence, on March 19 as it erupted into space with a rounded, twisting motion.

The eruption occurred over five hours as SDO watched the sun in the ultraviolet range of the light spectrum, SDO mission scientists said in a statement. The solar observatory watched as the prominence twisted up from the sun and expanded, then became unstable. [Video: Round Eruption From the Sun]

Ultimately, the sun filament lost cohesion and its particles streamed away from the sun.

"Prominences are elongated clouds of plasma that hover above the sun's surface, tethered by magnetic forces," SDO mission scientists explained.

The sun is currently in the midst of an active phase of its 11-year solar weather cycle and has kicked up a series of powerful eruptions and flares in recent months. The SDO spacecraft and other space observatories are keeping a close watch on the sun to monitor is solar weather activity. [Amazing Sun Photos from Space]

 

Earlier this month, the sun unleashed its second X-class solar flare of the year that was aimed at Earth. X-class solar flares are the strongest types of solar flares. The weakest types of solar flares are Class C sun storms, with Class M flares registering as medium strength, but still powerful, NASA scientists have said.

Strong solar flares, when aimed at Earth, can potentially disrupt satellites and power grids, as well as pose a hazard to astronauts on spacecraft. They can also spark dazzling shows of the northern lights, or aurora borealis.

 

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Space.com

Comment by Doone on March 23, 2011 at 8:27pm

From Starts with a Bang

 

Except, that is, near the North and South magnetic poles, where those field lines all appear to enter/exit our planet. And whenever the Sun emits a flare, prominence, or other "event," here's what happens.

solarflaremagneticfieldMSFC.jpg

(Image credit: NASA's Marshall Space Flight Center.)

 

 
 
 

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