Portal:Naturvetenskap

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Media som används på denna webbplats

Infoiconhourglass.svg
Info icon with hourglass
Integral as region under curve.svg
Författare/Upphovsman: 4C, Licens: CC BY-SA 2.5
Image showing an integral as the area of a region under a curve (Created with Inkscape v.043).
Equation: S = abf(x)dx, where y=f(x).
The Earth seen from Apollo 17.jpg
"The Blue Marble" is a famous photograph of the Earth taken on December 7, 1972, by the crew of the Apollo 17 spacecraft en route to the Moon at a distance of about 29,400 kilometres (18,300 mi). It shows Africa, Antarctica, and the Arabian Peninsula.
Ethanol - Space filling model.png
Författare/Upphovsman: JeanMi, Licens: CC BY-SA 3.0

3D model (space filling) of ethanol

Sunset-at-Sea.jpg
Författare/Upphovsman: unknown, Licens: CC BY-SA 1.0
Utvald medalj.GIF
sv:Medalj som utdelas till en utvald artikel. Medaljen kan även användas till att utmärka någon användare man tycker gort något speciellt bra för wikipedian.
Whirpool Galaxy.jpg
This Hubble composite image shows visible starlight as well as light from the emission of glowing hydrogen, which is associated with the most luminous young stars in the spiral arms.

The Whirlpool Galaxy, also known as M51 or NGC 5194, is having a close encounter with a nearby companion galaxy, NGC 5195, just off the upper edge of this image. The companion's gravitational pull is triggering star formation in the main galaxy, as seen in brilliant detail by numerous, luminous clusters of young and energetic stars. The bright clusters are highlighted in red by their associated emission from glowing hydrogen gas.

This Wide Field Planetary Camera 2 image enables researchers to clearly define the structure of both the cold dust clouds and the hot hydrogen and link individual clusters to their parent dust clouds.

Intricate structure is also seen for the first time in the dust clouds. Along the spiral arms, dust "spurs" are seen branching out almost perpendicular to the main spiral arms. The regularity and large number of these features suggests to astronomers that previous models of "two-arm" spiral galaxies may need to be revisited. The new images also reveal a dust disk in the nucleus, which may provide fuel for a nuclear black hole.
Bose Einstein condensate.png
Bose–Einstein condensate — In the July 14, 1995 issue of Science Magazine, researchers from JILA reported achieving a temperature far lower than had ever been produced before and creating an entirely new state of matter predicted decades ago by Albert Einstein and Indian physicist Satyendra Nath Bose. Cooling rubidium atoms to less than 170 billionths of a degree above absolute zero caused the individual atoms to condense into a "superatom" behaving as a single entity. The graphic shows three-dimensional successive snap shots in time in which the atoms condensed from less dense red, yellow and green areas into very dense blue to white areas. JILA is jointly operated by NIST and the University of Colorado at Boulder.