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spaceplasma:


MESSENGER’s receding view of Earth

The Mercury-bound MESSENGER spacecraft captured several stunning images of Earth during a gravity assist swingby of its home planet on Aug. 2, 2005. Several hundred images, taken with the wide-angle camera in MESSENGER’s Mercury Dual Imaging System (MDIS), were sequenced into a movie documenting the view from MESSENGER as it departed Earth.
Comprising 358 frames taken over 24 hours, the movie follows Earth through one complete rotation. The spacecraft was 40,761 miles (65,598 kilometers) above South America when the camera started rolling on Aug. 2. It was 270,847 miles (435,885 kilometers) away from Earth - farther than the Moon’s orbit - when it snapped the last image on Aug. 3.

Credit: NASA
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spaceplasma:

MESSENGER’s receding view of Earth

The Mercury-bound MESSENGER spacecraft captured several stunning images of Earth during a gravity assist swingby of its home planet on Aug. 2, 2005. Several hundred images, taken with the wide-angle camera in MESSENGER’s Mercury Dual Imaging System (MDIS), were sequenced into a movie documenting the view from MESSENGER as it departed Earth.

Comprising 358 frames taken over 24 hours, the movie follows Earth through one complete rotation. The spacecraft was 40,761 miles (65,598 kilometers) above South America when the camera started rolling on Aug. 2. It was 270,847 miles (435,885 kilometers) away from Earth - farther than the Moon’s orbit - when it snapped the last image on Aug. 3.

Credit: NASA


Explanation: This webcam and telescope image of banded gas giant Jupiter shows the transit of three shadows cast by Jupiter’s moons in progress, captured in Belgian skies on October 12 at 0528 UT. Such a three shadow transit is a relatively rare event, even for a large planet with many moons. Visible in the frame are the three Galilean moons responsible, Callisto at the far left edge, Io closest to Jupiter’s disk, and Europa below and just left of Io. Of their shadows on the sunlit Jovian cloud tops, Callisto casts the most elongated one near the planet’s south polar region at the bottom. Io’s shadow is above and right of Jupiter’s Great Red Spot. Of course viewed from Jupiter’s perspective, these shadow crossings could be seen as solar eclipses, analogous to the Moon’s shadow crossing the sunlit face of planet Earth.

Courtesy of  www.apod.nasa.gov View Larger

Explanation: This webcam and telescope image of banded gas giant Jupiter shows the transit of three shadows cast by Jupiter’s moons in progress, captured in Belgian skies on October 12 at 0528 UT. Such a three shadow transit is a relatively rare event, even for a large planet with many moons. Visible in the frame are the three Galilean moons responsible, Callisto at the far left edge, Io closest to Jupiter’s disk, and Europa below and just left of Io. Of their shadows on the sunlit Jovian cloud tops, Callisto casts the most elongated one near the planet’s south polar region at the bottom. Io’s shadow is above and right of Jupiter’s Great Red Spot. Of course viewed from Jupiter’s perspective, these shadow crossings could be seen as solar eclipses, analogous to the Moon’s shadow crossing the sunlit face of planet Earth.

Courtesy of  www.apod.nasa.gov


Neptune
Neptune is the eighth planet from the Sun and the smallest of the gas giants. Neptune was the first planet found by mathematical prediction after unexpected changes in the orbit of Uranus were observed. Neptune is named after the Roman god of the sea.
Planet Profile
Mass: 102,410,000,000,000,000 billion kg (17.15x Earth)Equatorial Diameter: 49,528 kmPolar Diameter: 48,682 kmEquatorial Circumference: 155,600 kmKnown Satellites: 14Notable Satellites: TritanOrbit Distance: 4,498,396,441 km (30.10 AU)Orbit Period: 60,190.03 Earth days (164.79 Earth years)Surface Temperature: -201 °CDiscover Date: September 23rd 1846Discovered By: Urbain Le Verrier & Johann Galle
Courtesy of www.space-facts.com View Larger

Neptune

Neptune is the eighth planet from the Sun and the smallest of the gas giants. Neptune was the first planet found by mathematical prediction after unexpected changes in the orbit of Uranus were observed. Neptune is named after the Roman god of the sea.

Planet Profile

Mass: 102,410,000,000,000,000 billion kg (17.15x Earth)
Equatorial Diameter: 49,528 km
Polar Diameter: 48,682 km
Equatorial Circumference: 155,600 km
Known Satellites: 14
Notable Satellites: Tritan
Orbit Distance: 4,498,396,441 km (30.10 AU)
Orbit Period: 60,190.03 Earth days (164.79 Earth years)
Surface Temperature: -201 °C
Discover Date: September 23rd 1846
Discovered By: Urbain Le Verrier & Johann Galle

Courtesy of www.space-facts.com


the-actual-universe:

LH 95
This stellar nursery lies in the Large Magellanic Cloud (LMC), our neighboring dwarf galaxy. The largest of these young stars generate powerful stellar winds, exciting the interstellar hydrogen gas and causing it to glow blue. Low mass infant stars can be found with stars with three times the mass of our own Sun or more. Dense, dusty portions of the star-forming region have clumped together, forming dark, colorful wisps. Several large, distant galaxies can be seen peeking through from the background, particularly near the bottom of the image. -RLOSources: 1, 2Image: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)-ESA/Hubble Collaboration
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the-actual-universe:

LH 95

This stellar nursery lies in the Large Magellanic Cloud (LMC), our neighboring dwarf galaxy. The largest of these young stars generate powerful stellar winds, exciting the interstellar hydrogen gas and causing it to glow blue. Low mass infant stars can be found with stars with three times the mass of our own Sun or more. Dense, dusty portions of the star-forming region have clumped together, forming dark, colorful wisps. Several large, distant galaxies can be seen peeking through from the background, particularly near the bottom of the image. 

-RLO

Sources: 1, 2
Image: NASAESA, and the Hubble Heritage Team (STScI/AURA)-ESA/Hubble Collaboration


Braided, serpentine filaments of glowing gas suggest this nebula’s popular name, The Medusa Nebula. Also known as Abell 21, this Medusa is an old planetary nebula some 1,500 light-years away in the constellation Gemini. Like its mythological namesake, the nebula is associated with a dramatic transformation. The planetary nebula phase represents a final stage in the evolution of low mass stars like the sun, as they transform themselves from red giants to hot white dwarf stars and in the process shrug off their outer layers. Ultraviolet radiation from the hot star powers the nebular glow. The Medusa’s transforming star is near the center of the overall bright crescent shape. In this deep telescopic view, fainter filaments clearly extend below and to the left of the bright crescent region. The Medusa Nebula is estimated to be over 4 light-years across.
Image courtesy of NASA Astronomy picture of the day - 2012 October 25 View Larger

Braided, serpentine filaments of glowing gas suggest this nebula’s popular name, The Medusa Nebula. Also known as Abell 21, this Medusa is an old planetary nebula some 1,500 light-years away in the constellation Gemini. Like its mythological namesake, the nebula is associated with a dramatic transformation. The planetary nebula phase represents a final stage in the evolution of low mass stars like the sun, as they transform themselves from red giants to hot white dwarf stars and in the process shrug off their outer layers. Ultraviolet radiation from the hot star powers the nebular glow. The Medusa’s transforming star is near the center of the overall bright crescent shape. In this deep telescopic view, fainter filaments clearly extend below and to the left of the bright crescent region. The Medusa Nebula is estimated to be over 4 light-years across.

Image courtesy of NASA Astronomy picture of the day - 2012 October 25