Podsumowanie 2017: świat

[Orionid]

Jeszcze można wspomnieć o :

Siedem skalistych planet w układzie TRAPPIST-1
Ozyrys przeleciał w pobliżu Ziemi
HST uchwycił aktywność komety C/2017 K2 (PANSTARRS) wędrującej w kierunku Słońca  w najdalszej odległości  od Słońca ( ok. 1,5 mld km)

Rocznice:

30 lat od odkrycia SN 1987A
20 lat od przelotu C/1995 O1 Hale-Bopp
50 lat od katastrofy Sojuza 1
50 lat od pożaru Apollo 1
50 lat od pierwszego lotu Saturna V

[Orionid]

Year In Review, 2017 (Part 3): Exoplanets finally show our solar system is not unique
written by Chris Gebhardt December 31, 2017

As 2017 comes to a close, it does so in the realm of exoplanet research having answered two very important questions that previous years had raised.  At the beginning of the year, our solar system appeared unique in terms of the sheer number of planets present, the number of planets orbiting within the habitable zone of a single star, and the fact that our four terrestrial planets are segregated in closer orbits to the sun than those of the four gas and ice giants.  We now end 2017 knowing that our solar system is not unique in any of those categories.

The list of known exoplanets exist almost exclusively in a small section of the Milky Way that’s visible from Earth or near-Earth space.  Beyond that, a few possible extragalactic planet detections are currently under evaluation for confirmation.  Also pending confirmation are more than 5,000 exoplanet candidates identified to date via NASA’s Kepler space telescope.

To date, the total exoplanet count stands at 3,710 planets scattered across 2,780 star systems – with 621 of those stellar systems containing more than one planet.  With 1-in-5 Sun-like stars known to contain at least one Earth-sized planet orbiting within the star’s habitable zone, and knowing there are approximately 200 billion stars in the Milky Way galaxy alone, there are hypothesized to be 11 billion habitable, Earth-sized planets in our galaxy around just Sun-like stars – a number that jumps to 40 billion habitable Earth-sized planets in the Milky Way  when red dwarf stars are included.


This figure shows the number of systems with one, two, three, planets, etc. Each dot represents one known planetary system. We know of more than 2,000 one-planet systems, and progressively fewer systems with many planets. Credit: NASA/Ames Research Center/Wendy Stenzel and The University of Texas at Austin/Andrew Vanderburg




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https://www.nasaspaceflight.com/2017/12/yir-2017-part-3-exoplanets-solar-system-not-unique/

[mss]

Jonathan McDowell @planet4589

Jonathan's 2017 year in space summary is now available at http://planet4589.org/space/papers/space17.pdf …

Bigger and better this year!

[Orionid]

Year In Review 2017 (Part 4): One year to New Horizons’ flyby of MU69
written by Chris Gebhardt January 1, 2018

As science teams and researchers spent 2017 pouring through the wealth of data returned by the New Horizons spacecraft during its historic flyby of the dwarf planet Pluto in July 2015, the spacecraft’s controllers spent the year busily preparing the craft for its anticipated flyby of Kuiper Belt Object 2014 MU69 – a flyby event scheduled for exactly one year from today on 1 January 2019.

https://www.nasaspaceflight.com/2018/01/yir-2017-part-4-one-year-new-horizons-flyby-mu69/

[Orionid]

2017 rok w nagraniach i animacjach
BY KRZYSZTOF KANAWKA ON 1 STYCZNIA 2018

45 lat obserwacji Ziemi w programie Landsat

Monitoring zmian na Ziemi byłby bardzo trudny bez zastosowania satelitów. Poniższe nagranie dotyczy programu Landsat, który od ponad 45 lat prowadzi działania związane z obserwacjami Ziemi.




45 lat programu Landsat / Credits – NASA Goddard

http://kosmonauta.net/2018/01/2017-rok-w-nagraniach-i-animacjach/

[Orionid]

Podsumowanie ESA



Link do materiału:

[Orionid]

Podsumowanie NASA



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