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Arp 273

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This image of a pair of interacting galaxies called Arp 273 was released to celebrate the 21st anniversary of the launch of the NASA/ESA Hubble Space Telescope.

The distorted shape of the larger of the two galaxies shows signs of tidal interactions with the smaller of the two. It is thought that the smaller galaxy has actually passed through the larger one.

Credit: NASA, ESA and the Hubble Heritage Team (STScI/AURA)

9 мая 2016 года от р.х. состоится транзит меркурия через солнечный диск

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Модель можно посмотреть на сайте НАСА, там же обещают и прямой эфир. Ingress at 14:12 МСК, egress at 21:40 МСК.

Меркурий является самой малой и легкой планетой Солнечной системы. Он легче и меньше Земли примерно в 20 раз, а его средняя плотность примерно такая же, как и у Земли. Год на планете длится около 88 дней. У нее нет спутников.

Гравитационное линзирование помогает раскрывать устройство вселенной

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Lensed SDP.81 discover faint dwarf galaxy for us

«Because of its relationship to the larger galaxy, estimated mass, and lack of an optical counterpart, the astronomers believe this gravitational anomaly may be caused by an extremely faint, dark-matter dominated satellite of the lensing galaxy. According to theoretical predictions, most galaxies should be brimming with similar dwarf galaxies and other companion objects. Detecting them, however, has proven challenging. Even around our own Milky Way, astronomers can identify only 40 or so of the thousands of satellite objects that are predicted to be present.»
Эта невидимая галактика отмечена яркой точкой в левой части. Изображение составлено из снимков HST и этой няшки
Подробнее:
http://apod.nasa.gov/apod/ap160420.html
https://public.nrao.edu/news/pressreleases/2016-sdp81-halo
https://public.nrao.edu/news/pressreleases/alma-ring-lens

Saggitarius Dwarf Elliptical Galaxy

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sag2loc[1]
On September 14, 2011, a team of astronomers revealed that the Milky Way’s spiral arms could have been generated after two collisions with SagDEG over the past billion years. As the galaxies collide, model simulations indicate that stars are sent streaming in long loops from both galaxies. These loops continue to swell with stars and are gradually tugged outward by the Milky Way’s rotation into ringed arms.
Больше разных интересностей и картинок на сайте http://www.solstation.com/x-objects/sag-deg.htm (pdf)
а тут: http://www.atlasoftheuniverse.com/250lys.html можно быстренько оценить масштабы видимой части вселенной.