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Active. Astronomy Picture of the Day ( APOD) is a website provided by NASA and Michigan Technological University (MTU). It reads: "Each day a different image or photograph of our universe is featured, along with a brief explanation written by a professional astronomer ." [ 1] The photograph does not necessarily correspond to a celestial event ...
He is an active researcher with interests that include gamma-ray bursts, gravitational lensing, and cosmology, and is the cofounder and coeditor of Astronomy Picture of the Day (APOD), the home page of which receives over a million hits a day, approximately 20% of nasa.gov traffic. He is married and has one daughter.
The Day the Earth Smiled. Earth can be seen as a blue dot underneath the rings of Saturn. The photomosaic from NASA's "Wave at Saturn" campaign. The collage includes some 1,600 photos taken by members of the public on The Day the Earth Smiled. The Day the Earth Smiled is a composite photograph taken by the NASA spacecraft Cassini on July 19, 2013.
Helix Nebula. The Helix Nebula (also known as NGC 7293 or Caldwell 63) is a planetary nebula (PN) located in the constellation Aquarius. Discovered by Karl Ludwig Harding, most likely before 1824, this object is one of the closest of all the bright planetary nebulae to Earth. [ 3] The distance, measured by the Gaia mission, is 655±13 light ...
O'Donnell has been awarded with the Astronomy Picture of the Day (APOD) by NASA twice. The first was published on the APOD website on March 20, 2015, entitled "Sunshine, Earthshine". [11] "Earth Shine" depicts the moon 14 hours after perigee, the point where the moon is closest to the earth. [12]
One star, catalogued J205551.3+435225, fulfilled all the criteria. Lying right in the centre of Sh2-117, with a temperature of over 40,000 K, it is almost certainly the ionising star for the North America and Pelican nebulae. [11] Later observations have revealed J205551.3+435225 is a spectral type O3.5 star, with another hot star (type O8) in ...
The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. The National Space Science Data Center (NSSDC) site has been known to host copyrighted content.
NASA's APOD: X-Rays from an Active Galaxy (July 5, 2003) NASA's APOD: The Galaxy Within Centaurus A (March 4, 2006) NASA's APOD: Centaurus A (July 12, 2018) NASA's APOD: Centaurus A: A Peculiar Island of Stars (May 3. 2023) High-resolution image of Centaurus A showing the discrete elements of galactic core; Centaurus A at UniverseToday.com