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Jupiter
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Caption: This full disk view of Jupiter was obtained on 21 April 2014 with Hubble's Wide Field Camera 3 (WFC3). It shows the prominent great red spot, a gigantic cyclone. Cloud ribbons cover the surface, whose colours stem from gases like ammonia and other chemical compounds.
Credit: NASA, ESA, and A. Simon (Goddard Space Flight Center)
Credit Link
Glossary Terms:
Gas Giant , Giant Planet , Great Red Spot , Jupiter , Outer Planets
Categories:
Solar System
License: Creative Commons Attribution 4.0 International (CC BY 4.0) Creative Commons Attribution 4.0 International (CC BY 4.0) icons
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167.16 kB)
The planet PDS 70b inside a protoplanetary disk
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Caption: An image of the planet PDS 70b. The young star PDS 70b has a protoplanetary disk surrounding it. Disks like these contains gas, fine sandy particles that astronomers refer to as dust and also larger bodies ranging from objects the size of pebbles to protoplanets (planets that are still forming).
This image was taken in infrared light using adaptive optics. Adaptive optics is a technique that uses flexible mirrors and computer analysis to remove the blurring effect of the Earth's atmosphere. This allows astronomers to search regions close to stars like PDS 70 that would otherwise be swamped by light from the star spread out by the Earth's atmosphere. In the center is a black circle. This is caused by a coronograph, a small circle that blocks out light from the parent star. This is surrounded by a bright oval, infrared light emitted from the material in the protoplanetary disk. To the right of the black circle covering the star is a bright dot. This is PDS 70b, a giant planet that is still forming .
Credit: ESO/ A. Müller, MPIA
Credit Link
Glossary Terms:
Planet Formation , Protoplanet , Protoplanetary Disk , Adaptive Optics
Categories:
Exoplanets & Astrobiology
License: Creative Commons Attribution 4.0 International (CC BY 4.0) Creative Commons Attribution 4.0 International (CC BY 4.0) icons
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( image
1.59 MB)
beta Pictoris b
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Caption: This composite of two images shows the planet beta Pictoris b and a disk of material both of which orbit the young star beta Pictoris. Both are taken in infrared light. The inner image was one of the first pictures taken of a planet around another star (an exoplanet). This image was made using a technique called adaptive optics which removes the blurring effect of the Earth's atmosphere that spreads out a star's light. The star's light is then concentrated tightly enough that it can be hidden behind a blocking circle (shown here in black) called a coronagraph. The ripples around this are artifacts of the imaging process. Beta Pictoris b, a gas giant planet about twelve times the mass of Jupiter, appears as a dot above and to the left of the black circle.
The outer image shows the thermal emission from the warm disk of material surrounding the young star beta Pictoris. As we are viewing this disk edge-on it appears as a line. This disk of gas and dust provided the material to form beta Pictoris b.
Credit: ESO/A.-M. Lagrange et al.
Credit Link
Glossary Terms:
Exoplanet , Planet Formation , Adaptive Optics
Categories:
Exoplanets & Astrobiology
License: Creative Commons Attribution 4.0 International (CC BY 4.0) Creative Commons Attribution 4.0 International (CC BY 4.0) icons
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128.05 kB)
The Prime Meridian
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Caption: The prime meridian is defined as zero degrees longitude and runs from the North Pole through Greenwich in London to the South Pole. It is represented as a bright red line on this schematic Earth map. The horizontal line corresponds to the equator, while the antimeridian itself forms the outer edges at 180 degrees to the west and east.
Credit: Wikicommons user Kmf164
Credit Link
Glossary Terms:
Equator , Prime Meridian
Categories:
Planet Earth
License: Public Domain Public Domain icons
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563.81 kB)
A total solar eclipse over the La Silla Observatory, Chile
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Caption: A real-time video showing the total solar eclipse on the 2nd of July 2019 over the La Silla Observatory in Chile. This video covers the moments before totality, the just under two minutes of totality, and the moments after totality. Note that at the start of the video the Sun was already almost completely obscured by the Moon, it is just hard to see due to the brightness of the Sun and the exposure of the camera. Indeed the Moon started partially eclipsing the Sun roughly an hour before the start of this recording and would continue to partially obscure the Sun for roughly the same time afterwards.
At the point of totality one can see the faint glow of the Sun’s diffuse outer regions and on the horizon one can also see the glow from the parts of the surrounding areas on Earth that are not experiencing totality.
Credit: ESO/A. Santerne
Credit Link
Glossary Terms:
Solar Eclipse , Total Solar Eclipse
Categories:
Planet Earth
, Solar System
License: Creative Commons Attribution 4.0 International (CC BY 4.0) Creative Commons Attribution 4.0 International (CC BY 4.0) icons
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( video
255.13 MB)
