Search Results

Search Results

Refine this search

1,296 results

Image

from article Meteor

Result thumbnail
Leonid meteor shower observed at the Modra Astronomical Observatory in Slovakia through a fisheye lens. The exposure on November 16–17, 1998, lasted 4 h. About 150 bolides brighter than magnitude −2 can be seen; the brightest fireball is about…

Image

from article Ursa Major

Result thumbnail
Modern boundaries of the constellation Ursa Major, the Great Bear. The celestial equator is 0° of declination, which corresponds to celestial latitude. Right ascension corresponds to celestial longitude, with each hour of right ascension…

Image

from article Piloting

Result thumbnail
A fix from two bearings.

Image

from article Piloting

Result thumbnail
A fix which is obtained from a bearing and the distance of a single object. 6.3 mi = 10 km.

Image

from article Piloting

Result thumbnail
A horizontal danger angle.

Image

from article Rate-of-climb indicator

Result thumbnail
Rate-of-climb indicator or vertical-speed indicator. (a) Components. (b) Face. (After Federal Aviation Administration, Airframe and Powerplant Mechanics Airframe Handbook, AC 65-15A, 1976)

Image

from article X-ray telescope

Result thumbnail
Wolter type I x-ray telescope, in this case the Chandra X-ray Observatory. Two surfaces of revolution (paraboloid and hyperboloid) reflect the incident x-rays to a common focus. The horizontal scale is greatly compressed. (Chandra X-ray Center)

Image

from article X-ray telescope

Result thumbnail
A composite image of the Sun using the Solar Dynamics Observatory (SDO). The x-rays are shown in three colors: red (21.1 nm), green (19.3 nm), and blue (17.1 nm). (Lockheed Martin Solar and Astrophysics Laboratory, Smithsonian Astrophysical…

Image

from article X-ray telescope

Result thumbnail
Schematic of a microcalorimeter. An absorber is kept very cold. Then when an x-ray hits, the temperature change is measured. From this, the energy of the x-ray can be computed. (NASA)

Learn more about AccessScience

a female college student looking at the screen of her silver-cased laptop computer
Watch the YouTube video

flyer thumbnail

Download the flyerGet Adobe Acrobat Reader pdf icon