Rhabdastrella
Rhabdastrella globostellata
Scientific classification
Kingdom: Animalia
Phylum: Porifera
Class: Demospongiae
Order: Astrophorida
Family: Ancorinidae
Genus: Rhabdastrella
Thiele, 1903[1]
Species

See text

Synonyms

Aurora Sollas, 1888
Diastra Row, 1911

Rhabdastrella is a genus of marine sponges belonging to the family of Ancorinidae.[2]

Species [link]

References [link]



https://wn.com/Rhabdastrella

Aurora

An aurora, sometimes referred to as a polar light, is a natural light display in the sky, predominantly seen in the high latitude (Arctic and Antarctic) regions. Auroras are produced when the magnetosphere is sufficiently disturbed by the solar wind that the trajectories of charged particles in both solar wind and magnetospheric plasma, mainly in the form of electrons and protons, precipitate them into the upper atmosphere (thermosphere/exosphere), where their energy is lost. The resulting ionization and excitation of atmospheric constituents emits light of varying colour and complexity. The form of the aurora, occurring within bands around both polar regions, is also dependent on the amount of acceleration imparted to the precipitating particles. Precipitating protons generally produce optical emissions as incident hydrogen atoms after gaining electrons from the atmosphere. Proton auroras are usually observed at lower latitudes. Different aspects of an aurora are elaborated in various sections below.

Aurora (Spencer, Virginia)

Aurora, also known as the Pink House, Boxwood, and the Penn Homestead, is a historic home located at Penn's Store near Spencer, Patrick County, Virginia. It was built between 1853 and 1856, and is a two-story, three-bay, hipped-roof frame house in the Italian Villa style. It features one-story porches on the east and west facades, round-arched windows, clustered chimneys, and low pitched roofs. Also on the property is a contributing small one-story frame building once used as an office. It was built by Thomas Jefferson Penn (1810-1888), whose son, Frank Reid Penn founded the company F.R & G. Penn Co. that was eventually acquired by tobacco magnate James Duke to form the American Tobacco Company.

It was listed on the National Register of Historic Places in 2009.

References


Aurora (Turin)

Aurora is an historical district in the city of Turin, Italy. The district includes:

  • Porta Palazzo quarter has the biggest European open market (Mercato di Porta Palazzo), hosted in Piazza della Repubblica;
  • Borgo Dora quarter, which hosts the Sermig institution;
  • Valdocco quarter, which hosts the Santuario di Maria Ausiliatrice (Sanctuary of Our Lady Help of Christians) and the minor basilica of the Santuario della Consolata (Sanctuary of the Virgin of Consolation).
  • Coordinates: 45°04′59″N 7°41′17″E / 45.08306°N 7.68806°E / 45.08306; 7.68806


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