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Light Curve of Comet C/2025 F2 (SWAN) C/2025 F2 (스완) 혜성의 광도 곡선 Light Curve of Comet C/2025 F2 (SWAN). C/2025 F2 (스완) 혜성의 광도 곡선. C/2025 F2 혜성은 붕괴된 것으로 예상하며, 혜성의 밝기는 점차 어두워져가고 있는 것 같다. Comet C/2025 F2 (SWAN) appears to be disintegrating and becoming increasingly dimmer. Large image: https://cometsky.com/astronews/c2025f2_lc_250422_new_bsyeom.jpg Image credit: COBS Comet Observation Database, Crni Vrh observatory, Bum-Suk Yeom (염범석). 2025. 4. 22.
Messier 11 (The Wild Duck Cluster) M11 (야생오리 성단) Messier 11 (The Wild Duck Cluster). M11 (야생오리 성단). 2025. 4. 10. 18:37 UT (4. 11. 03:37 KST). Total exposure time : 15sec x 100 = 25 min. https://cometsky.com/astrophotos/m11_20250410_bsyeom.jpgTaken by Bum-Suk Yeom (염범석). 2025. 4. 10. 18:37 UT, Celestron 8” Rowe-Ackermann Schmidt Astrograph (RASA 8, D=200mm, f=400mm, f/2), iOptron HAE43 Harmonic Mount, ZWO ASI533MC Pro Camera, Sightr.. 2025. 4. 21.
Possible disintegration of Comet C/2025 F2 (SWAN) C/2025 F2 (스완) 혜성의 붕괴 가능성 Possible disintegration of Comet C/2025 F2 (SWAN).C/2025 F2 (스완) 혜성의 붕괴 가능성. Comet C/2025 F2 (SWAN) may be disintegrating as it approaches the sun. Several comet observers have reported that Comet C/2025 F2 began to disintegrate on April 16. They also reported that the comet's coma has become smaller and longer, and its tail has become much weaker. We will keep an eye on this comet until early M.. 2025. 4. 19.
Comet C/2025 F2 (SWAN) Observation Information C/2025 F2 (스완) 혜성의 관측 정보 Comet C/2025 F2 (SWAN) Observation Information. C/2025 F2 (스완) 혜성의 관측 정보. https://cometsky.com/astronews/c2025f2_swan_info_med_bsyeom.jpg Large photo: https://cometsky.com/astronews/c2025f2_swan_info_large_bsyeom.jpg(6,000 x 8,388 pixels, 5MB) - Discovery Date (발견일) : 29 March 2025 UTC - Discovery Magnitude (발견 당시 밝기) : 11.5 mag - Discoverer (발견자) : Michael Mattiazzo, Vladimir Bezug.. 2025. 4. 18.
지리산 정령치 휴게소 전망대에서 바라본 동쪽 하늘 지리산 정령치 휴게소 전망대에서 바라본 동쪽 하늘. 2025. 04. 11. 05:04 KST. https://cometsky.com/astrophotos/Jirisan_Jeongryeongchi_panorama_med_bsyeom.jpg 2025. 4. 12.
Comet C/2025 F2 (SWAN) C/2025 F2 (스완) 혜성 Comet C/2025 F2 (SWAN).    C/2025 F2 (스완) 혜성.    2025. 4. 10. 19:47 UT (4. 11. 04:47 KST).        Total exposure time : 60sec x 5 = 5 min.  https://cometsky.com/astrophotos/c2025f2_20250410_bsyeom.jpgTaken by Bum-Suk Yeom (염범석).  2025. 4. 10. 19:47 UT, Celestron 8” Rowe-Ackermann Schmidt Astrograph (RASA 8, D=200mm, f=400mm, f/2), iOptron HAE43 Harmonic Mount, ZWO ASI533MC Pro Camera, Sightron C.. 2025. 4. 11.
Comet C/2025 F2 (SWAN) C/2025 F2 (스완) 혜성 Comet C/2025 F2 (SWAN).   C/2025 F2 (스완) 혜성.   2025. 4. 8. 19:44 UT (4. 9. 04:44 KST).       Total exposure time : 30sec x 2 = 1 min. http://cometsky.com/astrophotos/c2025f2_20250409_bsyeom.jpgTaken by Bum-Suk Yeom (염범석). I took pictures of the comet under sky conditions where even a 2nd magnitude star could be seen with the naked eye due to the clouds. However, I was surprised that the comet wa.. 2025. 4. 10.
SOLAR MINIMUM (2019) & SOLAR MAXIMUM (2024) 태양 활동 극소기(2019년)와 극대기(2024년) SOLAR MINIMUM (2019) & SOLAR MAXIMUM (2024).   태양 활동 극소기(2019년)와 극대기(2024년).     Large image: http://cometsky.com/astronews/solar_min_max_2019_2024_bsyeom.jpg  https://www.swpc.noaa.gov/products/solar-cycle-progression?fbclid=IwY2xjawJZ6illeHRuA2FlbQIxMAABHWpdRV7R93QVftTd6f1PX7Ewa-K1ulFGExCJNZezodx1idacFdpTXTL9aQ_aem_aClNaTNHRMeoomt-FxcfqQ Taken by Bum-Suk Yeom. 염범석. Solar activity appears to be.. 2025. 4. 3.
Spring constellations 봄철의 주요 별자리 Spring constellations. 봄철의 주요 별자리.   염범석. Bum-Suk Yeom.   Large size:  http://cometsky.com/astronews/spring_skymap_bw_bsyeom.jpg 2025. 4. 2.
Celestial objects to observe in April 2025 2025년 4월의 천체 관측 대상들 Celestial objects to observe in April 2025.     2025년 4월의 천체 관측 대상들.        Large photo:     https://cometsky.com/astronews/2025_04_apr_skyobject_large_bsyeom.jpg  Bum-Suk Yeom. 염범석. 2025. 4. 2.
Partial solar eclipse live stream screen capture 부분 일식 생중계 화면 캡쳐 Partial solar eclipse live stream screen capture from Timeanddate site.Timeanddate 사이트의 부분일식 생중계 화면 캡쳐. Image credit: www.timeanddate.com 2025. 3. 29.
LIVE: Partial Solar Eclipse - March 29, 2025 2025년 3월 29일 부분일식 생중계 2025년 3월 29일 부분일식 생중계. LIVE: Partial Solar Eclipse - March 29, 2025. 1. Time and Date    https://www.youtube.com/watch?v=j3T20T8k2h0     https://www.timeanddate.com/live/eclipse-solar-2025-march-292. Royal Observatory Greenwich    https://www.youtube.com/watch?v=NwOL-q1FuVM + 식의 진행 시간 (지구 전체 기준)    - 부분식 시작 : 3월 29일 17:50 한국시간)   - 식의 최대 : 3월 29일 19:47 한국시간)   - 부분식 종료 : 3월 29일 21:43 한국시간) + Whe.. 2025. 3. 29.