星界の報告

星界の報告

「星界の報告(Siderevs Nvncivs)」はガリレオ・ガリレイが1610年に出版した著書。このサイトではガリレオの業績に敬意を表し,星・天文学に関する話題を紹介する。

thedemon-hauntedworld:

International Space Station Silhouetted against The Moon[credit]

thedemon-hauntedworld:

International Space Station Silhouetted against The Moon
[credit]

(jaconyから)

Eclipse by thegreatlandoni on Flickr.

Eclipse by thegreatlandoni on Flickr.

Hubble Sees Galaxies Spiraling around Leo by NASA Goddard Photo and Video on Flickr.Via Flickr:
Shown here is a spiral galaxy known as NGC 3455, which lies some 65 million light-years away from us in the constellation of Leo (the Lion).
Galaxies are classified into different types according to their structure and appearance. This classification system is known as the Hubble Sequence, named after its creator Edwin Hubble.
In this image released 14, April, 2014, NGC 3455 is known as a type SB galaxy — a barred spiral. Barred spiral galaxies account for approximately two thirds of all spirals. Galaxies of this type appear to have a bar of stars slicing through the bulge of stars at their center. The SB classification is further sub-divided by the appearance of a galaxy’s pinwheeling spiral arms; SBa types have more tightly wound arms, whereas SBc types have looser ones. SBb types, such as NGC 3455, lie in between.
NGC 3455 is part of a pair of galaxies — its partner, NGC 3454, lies out of frame. This cosmic duo belong to a group known as the NGC 3370 group, which is in turn one of the Leo II groups, a large collection of galaxies scattered some 30 million light-years to the right of the Virgo cluster.
This image is from Hubble’s Advanced Camera for Surveys.
Credit:  ESA/Hubble & NASA, Acknowledgement: Nick RoseNASA image use policy.NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission.Follow us on TwitterLike us on FacebookFind us on Instagram

Hubble Sees Galaxies Spiraling around Leo by NASA Goddard Photo and Video on Flickr.

Via Flickr:
Shown here is a spiral galaxy known as NGC 3455, which lies some 65 million light-years away from us in the constellation of Leo (the Lion).

Galaxies are classified into different types according to their structure and appearance. This classification system is known as the Hubble Sequence, named after its creator Edwin Hubble.
In this image released 14, April, 2014, NGC 3455 is known as a type SB galaxy — a barred spiral. Barred spiral galaxies account for approximately two thirds of all spirals. Galaxies of this type appear to have a bar of stars slicing through the bulge of stars at their center. The SB classification is further sub-divided by the appearance of a galaxy’s pinwheeling spiral arms; SBa types have more tightly wound arms, whereas SBc types have looser ones. SBb types, such as NGC 3455, lie in between.

NGC 3455 is part of a pair of galaxies — its partner, NGC 3454, lies out of frame. This cosmic duo belong to a group known as the NGC 3370 group, which is in turn one of the Leo II groups, a large collection of galaxies scattered some 30 million light-years to the right of the Virgo cluster.

This image is from Hubble’s Advanced Camera for Surveys.

Credit: ESA/Hubble & NASA, Acknowledgement: Nick Rose

NASA image use policy.

NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission.

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NASA's Kepler Discovers First Earth-Size Planet In The 'Habitable Zone' of Another Star

guardian:

'Blood moon' lunar eclipse – in pictures
The moon turns red and orange during a total lunar eclipse due to a perfect alignment of the sun, Earth and the moon, otherwise known as a syzygy. See more
Click photos for captions and credits.guardian:

'Blood moon' lunar eclipse – in pictures
The moon turns red and orange during a total lunar eclipse due to a perfect alignment of the sun, Earth and the moon, otherwise known as a syzygy. See more
Click photos for captions and credits.guardian:

'Blood moon' lunar eclipse – in pictures
The moon turns red and orange during a total lunar eclipse due to a perfect alignment of the sun, Earth and the moon, otherwise known as a syzygy. See more
Click photos for captions and credits.

guardian:

'Blood moon' lunar eclipse – in pictures

The moon turns red and orange during a total lunar eclipse due to a perfect alignment of the sun, Earth and the moon, otherwise known as a syzygy. See more

Click photos for captions and credits.

(元記事: theguardian.com (jaconyから))