NASA Returns Hubble Space Telescope to Science Operations
허블우주망원경(HST)의 과학 장비 작동이 정상 상태로 복구되다

July 17, 2021 - NASA Returns Hubble Space Telescope to Science Operations
2021년 7월 17일 - 허블우주망원경(HST)의 과학 장비 작동이 정상 상태로 복구.

https://www.nasa.gov/feature/goddard/2021/operations-underway-to-restore-payload-computer-on-nasas-hubble-space-telescope

NASA has returned the science instruments on the Hubble Space Telescope to operational status, and the collection of science data will now resume. This will be the first science data collected since the payload computer experienced a problem on June 13.

NASA는 허블우주망원경의 과학 장비를 작동 가능한 상태로 되돌렸고, 이제 과학 데이터 수집이 재개될 것이다. 이것은 6월 13일 탑재된 컴퓨터에 문제가 발생한 이후 수집되는 첫 과학 데이터가 될 것이다.

Credits: NASA.

2021년 7월의 천체 관측 대상들.

Celestial objects to observe in July 2021 (37°N).

염범석. Bum-Suk Yeom.

http://cometsky.com/astronews/2021_07_july_skyobject_med_bsyeom.jpg

Large photo:

http://cometsky.com/astronews/2021_07_july_skyobject_large_bsyeom.jpg

Perseverance's Selfie with Ingenuity.
인제뉴어티와 함께 한 퍼서비어런스의 셀카.

https://mars.nasa.gov/system/downloadable_items/45948_PIA24542-Close-Up-Figure-4.jpg

https://mars.nasa.gov/resources/25790/perseverances-selfie-with-ingenuity/

NASA’s Perseverance Mars rover took a selfie with the Ingenuity helicopter, seen here about 13 feet (3.9 meters) from the rover in this image taken April 6, 2021, the 46th Martian day, or sol, of the mission by the WATSON (Wide Angle Topographic Sensor for Operations and eNgineering) camera on the SHERLOC (Scanning Habitable Environments with Raman and Luminescence for Organics and Chemicals) instrument, located at the end of the rover's long robotic arm.

나사의 퍼서비어런스 로버(탐사차)는 인제뉴어티 헬리콥터로 셀카를 찍었다. 이 사진은 2021년 4월 6일에 로버의 긴 로봇팔 끝에 있는 셜록(SHERLOC) 장비에 장착된 왓슨(WATSON)으로 촬영한 사진입니다.

Image Credit: NASA, JPL-Caltech, MSSS.

(Video) Jupiter (with Great Red Spot) and 4 Moons.

(동영상) 대적점이 있는 목성과 4대 위성들.

27 June 2021, 05:03 KST.

날이 밝아오는 시간이라 목성의 대적점이 선명하게 나오지 않았습니다.

Taken by Bum-Suk Yeom(염범석) on June 26, 2021 UT @ Iksan, South Korea.

Galaxy Note 8 smartphone camera, TOA-150 (D=150mm, f/7.3) Refractor, 5mm Eyepiece.

Betelgeuse’s surface before and during its 2019–2020 Great Dimming.
2019년과 2020년 사이에 발생한 전례없는 밝기 감소동안에 베텔게우스의 표면.

http://cometsky.com/astronews/betelgeuse_lc_201812_202106_aavso_bsyeom.jpg

These images, taken with the SPHERE instrument on ESO’s Very Large Telescope, show the surface of the red supergiant star Betelgeuse during its unprecedented dimming, which happened in late 2019 and early 2020.
M. Montargès et al. report high-angular-esolution observations showing that the southern hemisphere of Betelgeuse was ten times darker than usual in the visible spectrum during its Great Dimming. Observations and modelling support a scenario in which a dust clump formed recently in the vicinity of the star, owing to a local temperature decrease in a cool patch that appeared on the photosphere.

유럽남방천문대(ESO)의 VLT(Very Large Telescope) 망원경에 장착된 스피어(SPHERE) 장비로 촬영한 이 이미지는 2019년 말과 2020년 초에 발생한 전례없는 밝기 감소동안 적색 초거성 베텔게우스의 표면을 보여줍니다. 
베텔게우스는 적색 거성으로 오리온자리에서 가장 밝은 별입니다. 2021년 6월 16일, 천문학자 미구엘 몽타르제스 박사가 이끄는 연구팀은 '네이처(Nature)'에 발표한 연구 결과에서 베텔게우스의 '급격한 밝기 감소'는 이 별의 남반구 일부지역 온도가 떨어지면서 발생한 먼지구름이 별빛을 가리면서 발생한 것이라고 분석하였다.

A dusty veil shading Betelgeuse during its Great Dimming :
https://www.eso.org/public/archives/releases/sciencepapers/eso2109/eso2109a.pdf

https://www.nature.com/articles/s41586-021-03546-8

https://www.nature.com/articles/d41586-021-01526-6

Credit: 염범석 Bum-Suk Yeom, AAVSO, ESO, M. Montargès et al.

Betelgeuse’s surface before and during its 2019–2020 Great Dimming.
2019년과 2020년 사이에 발생한 전례없는 밝기 감소동안에 베텔게우스의 표면.

http://cometsky.com/astronews/betelgeuse_lc_201812_202004_aavso_bsyeom.jpg

These images, taken with the SPHERE instrument on ESO’s Very Large Telescope, show the surface of the red supergiant star Betelgeuse during its unprecedented dimming, which happened in late 2019 and early 2020.
M. Montargès et al. report high-angular-esolution observations showing that the southern hemisphere of Betelgeuse was ten times darker than usual in the visible spectrum during its Great Dimming. Observations and modelling support a scenario in which a dust clump formed recently in the vicinity of the star, owing to a local temperature decrease in a cool patch that appeared on the photosphere.

유럽남방천문대(ESO)의 VLT(Very Large Telescope) 망원경에 장착된 스피어(SPHERE) 장비로 촬영한 이 이미지는 2019년 말과 2020년 초에 발생한 전례없는 밝기 감소동안 적색 초거성 베텔게우스의 표면을 보여줍니다. 
베텔게우스는 적색 거성으로 오리온자리에서 가장 밝은 별입니다. 2021년 6월 16일, 천문학자 미구엘 몽타르제스 박사가 이끄는 연구팀은 '네이처(Nature)'에 발표한 연구 결과에서 베텔게우스의 '급격한 밝기 감소'는 이 별의 남반구 일부지역 온도가 떨어지면서 발생한 먼지구름이 별빛을 가리면서 발생한 것이라고 분석하였다.

A dusty veil shading Betelgeuse during its Great Dimming :
https://www.eso.org/public/archives/releases/sciencepapers/eso2109/eso2109a.pdf

https://www.nature.com/articles/s41586-021-03546-8

https://www.nature.com/articles/d41586-021-01526-6

Credit: 염범석 Bum-Suk Yeom, AAVSO, ESO, M. Montargès et al.

Ganymede eclipses Io on June 12, 2021 KST.
2021년 6월 12일 새벽, 가니메데가 이오를 가린다.

2021.06.12. 02:43 KST (June 11, 17:43 UT).

http://cometsky.com/astronews/io_eclipse_20210610_large_bsyeom.jpg

2021년 6월 12일 새벽 2시 43분에 목성의 위성 가니메데(Ganymede)가 이오(Io)를 가리는 식현상이 일어납니다. 약 40분에 걸쳐서 일어나는 이번 식 현상은 약 2시 43분에 시작하여 약 3시 1분 전후로 최대로 가려지며 약 3시 20분에 종료됩니다. 이번 식 현상은 이오가 가니메데의 그림자에 거의 90% 이상 가려져서 밝기의 감소가 매우 큰 편입니다.

6월 12일 02:43 기준으로 이오의 고도는 약 27도입니다.

Credit: 염범석 Bum-Suk Yeom, Stellarium software.

2021 Annular Solar Eclipse Live Stream.

10 Jun 2021, 09:00 UTC.

2021 금환일식 인터넷 생중계.

2021년 6월 10일 18:00 KST.

http://cometsky.com/astronews/astronews_20210609_ase_bsyeom.jpg
  

Annular Solar Eclipse Live Stream website.

1. NASA TV
https://www.youtube.com/watch?v=21X5lGlDOfg

2. TimeandDate.com
https://www.youtube.com/watch?v=7S6dhT1voAo

3. Virtual Telescope Project
https://www.youtube.com/watch?v=ewnLJFIK53A

4. https://www.youtube.com/watch?v=cJ9fDbx7QkM

The annular eclipse will be visible from parts of northeastern Canada, Greenland, the Arctic Ocean  (passing over the North Pole), and the Russian Far East.

# Solar eclipse timings

- Partial eclipse begin 08:12 UTC

- Full eclipse begin 09:49 UTC

- Maximum Eclipse 10:41 UTC

- Full eclipse end 11:33 UTC

- Partial eclipse end 13:11 UTC

금환일식은 캐나다 북동부, 그린란드, 북극해 (북극을 통과), 그리고 러시아 극동 지역에서 볼 수 있습니다.

# 금환일식 진행 과정

- 부분식 시작 17:12 KST

- 금환식 시작 18:49 KST

- 금환식 최대 19:41 KST

- 금환식 종료 20:33 KST

- 부분식 종료 22:11 KST

염범석. Bum-Suk Yeom.

Waxing Gibbous Moon. 

상현망.

http://www.cometsky.com/astrophotos/moon_20210522_web_bsyeom.jpg

Large size:
http://www.cometsky.com/astrophotos/moon_20210522_med_bsyeom.jpg

Taken by Bum-Suk Yeom (염범석).

2021. 05. 22. 14:32 UT, Vixen ED81SII Refractor (f=625mm, F7.7) + ZWO ASI183MC Pro camera, Baader UV/IR cut filter, 90 sec video(75%, 375 image stack), Iksan, South Korea.

2021년 5월 22일 23:32 KST, 빅센 ED81SII 굴절 망원경(초점거리=625mm, F수=7.7), ZWO ASI183MC Pro 카메라, 바더 UV/IR 차단 필터, 90초 노출 동영상(75%, 375장 사진 합성), 전라북도 익산시.

여름철의 주요 별자리.

Summer constellations.

염범석. Bum-Suk Yeom.

http://cometsky.com/astronews/02_summer_skymap_02_large_bsyeom.jpg

http://cometsky.com/astronews/02_summer_skymap_01_large_bsyeom.jpg