Cosmos Astronomia® 🔭

🌠 Astronomy Picture of the Day #APOD
🕑 Date hashtag: (#day20191022)
✍️ Copyright: Jheison Huerta
📝 Title: Night Sky Reflections from the World's Largest Mirror
🤔 Explanation: What's being reflected in the world's largest mirror? Stars, galaxies, and a planet. Many of these stars are confined to the grand arch that runs across the image, an arch that is the central plane of our home Milky Way Galaxy. Inside the arch is another galaxy -- the neighboring Large Magellanic Cloud (LMC). Stars that are individually visible include Antares on the far left and Sirius on the far right. The planet Jupiter shines brightly just below Antares. The featured picture is composed of 15 vertical frames taken consecutively over ten minutes from the Uyuni Salt Flat in Bolivia. Uyuni Salt Flat (Salar de Uyuni) is the largest salt flat on Earth and is so large and so extraordinarily flat that, after a rain, it can become the world's largest mirror -- spanning 130 kilometers. This expansive mirror was captured in early April reflecting each of the galaxies, stars, and planet mentioned above.
See you tomorrow with the next APOD! 😌

Image:
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🌠 Astronomy Picture of the Day #APOD
🕑 Date hashtag: (#day20191021)
✍️ Copyright: Not known.
📝 Title: A Mercury Transit Music Video from SDO
🤔 Explanation: What's that small black dot moving across the Sun? Mercury. Possibly the clearest view of Mercury crossing in front of the Sun in 2016 May was from Earth orbit. The Solar Dynamics Observatory obtained an uninterrupted vista recording it not only in optical light but also in bands of ultraviolet light. Featured here is a composite movie of the crossing set to music. Although the event might prove successful scientifically for better determining components of Mercury' ultra-thin atmosphere, the event surely proved successful culturally by involving people throughout the world in observing a rare astronomical phenomenon. Many spectacular images of this Mercury transit from around (and above) the globe were proudly displayed. The next transit of Mercury will take place in three weeks: on 2019 November 11. Astrophysicists: Browse 2,000+ codes in the Astrophysics Source Code Library
See you tomorrow with the next APOD! 😌

Video:
https://www.youtube.com/embed/AhWMOkrzKzs?rel=0

The dust on my laptop screen & reflection of the camera flash looks like a photo of a star through a powerful telescope

🌠 Astronomy Picture of the Day #APOD
🕑 Date hashtag: (#day20191020)
✍️ Copyright: Not known.
📝 Title: Pluto at Night
🤔 Explanation: The night side of Pluto spans this shadowy scene, a stunning spacebased view with the Sun 4.9 billion kilometers (almost 4.5 light-hours) behind the dim and distant world. It was captured by far flung New Horizons in July of 2015. The spacecraft was at a range of some 21,000 kilometers from Pluto, about 19 minutes after its closest approach. A denizen of the Kuiper Belt in dramatic silhouette, the image also reveals Pluto's tenuous, surprisingly complex layers of hazy atmosphere. The crescent twilight landscape near the top of the frame includes southern areas of nitrogen ice plains now formally known as Sputnik Planitia and rugged mountains of water-ice in the Norgay Montes.
See you tomorrow with the next APOD! 😌

Image:
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🌠 Astronomy Picture of the Day #APOD
🕑 Date hashtag: (#day20191019)
✍️ Copyright: Not known.
📝 Title: All Female Spacewalk Repairs Space Station
🤔 Explanation: The failed unit was beyond the reach of the robotic Canadarm2. Therefore, this repair of the International Space Station would require humans. The humans on duty were NASA's Jessica Meir and Christina Koch. This was the fourth spacewalk for Koch, the first for Meir, and the first all-female spacewalk in human history. The first woman to walk in space was Svetlana Savitskaya in 1984. Koch (red stripe) and Meir are pictured hard at work on the P6 Truss, with solar panels and the darkness of space in the background. Working over seven hours, the newly installed Battery Charge / Discharge Unit (BCDU) was successfully replaced and, when powered up, operated normally.
See you tomorrow with the next APOD! 😌

Image:
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The Tycho Supernova: Death of a Star
#NASA | @Nasaspotlight

https://ift.tt/31prkLF

🌠 Astronomy Picture of the Day #APOD
🕑 Date hashtag: (#day20191018)
✍️ Copyright: Not known.
📝 Title: Interstellar Interloper 2I/Borisov
🤔 Explanation: After the 2017 detecton of 1I/'Oumuamua, comet 2I/Borisov has become the second recognized interstellar interloper. Like 'Oumuamua, Borisov's measured hyperbolic trajectory and speed as it falls toward the Sun confirm that its origin is from beyond our Solar System. But while detailed observations indicate 'Oumuamua is a rocky body with differences from known Solar System objects, Borisov is definitely a far wandering comet. Taken on October 12, 2019 this Hubble Space Telescope image of Borisov reveals a familiar looking comet-like activity and concentration of dust around around its nucleus. Not resolved in the image, some estimates suggest the nucleus could be between 2 and 16 kilometers in diameter. At the time of the Hubble image, comet 2I/Borisov was about 418 million kilometers away. Borisov is still inbound though and will make its closest approach to the Sun on December 7 at a distance of about 300 million kilometers (2 Astronomical units).
See you tomorrow with the next APOD! 😌

Image:
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