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Celestial objects to observe in June 2025 2025년 6월의 천체 관측 대상들 Celestial objects to observe in June 2025. 2025년 6월의 천체 관측 대상들. Large photo: https://cometsky.com/astronews/2025_06_june_skyobject_large_bsyeom.jpgBum-Suk Yeom. 염범석. 2025. 6. 2.
Summer constellations 여름철의 주요 별자리 Summer constellations. 여름철의 주요 별자리. https://cometsky.com/astronews/summer_skymap_01_large_bsyeom.jpg https://cometsky.com/astronews/summer_skymap_02_large_bsyeom.jpg 염범석. Bum-Suk Yeom. 2025. 6. 1.
Naked-Eye Giant Sunspot Returns 맨눈으로 관측 가능한 거대한 태양 흑점의 귀환 Naked-Eye Giant Sunspot Returns (using Solar Glasses). (태양 안경을 사용하여) 맨눈으로 관측 가능한 거대한 태양 흑점의 귀환. Large photo: https://cometsky.com/astronews/sun_20250526_sdo_bsyeom.jpgThe biggest sunspot of 2025 is coming back. After a two week transit around the farside of the sun, sunspot 4079 returns to transit the solar disk. The sunspot is currently five times the size of Earth. (Caution) .. 2025. 5. 26.
Big Dipper 북두칠성 Big Dipper. 북두칠성. Large photos: https://cometsky.com/astrophotos/big_dipper_20250323_large_bsyeom.jpghttps://cometsky.com/astrophotos/big_dipper_20250323_large_ex_bsyeom.jpghttps://cometsky.com/astrophotos/big_dipper_20250323_web_bsyeom.jpghttps://cometsky.com/astrophotos/big_dipper_20250323_web_ex_bsyeom.jpg 염범석. Bum-Suk Yeom. Taken by Bum-Suk Yeom ( https://www.cometsky.com ) on Mar.. 2025. 5. 7.
Sagittarius, Scorpius, and the Summer Milky Way 궁수자리, 전갈자리, 그리고 여름철 은하수 Sagittarius, Scorpius, and the Summer Milky Way. 궁수자리, 전갈자리, 그리고 여름철 은하수. Large photos: https://cometsky.com/astrophotos/sgr_sco_20250501_large_new_bsyeom.jpghttps://cometsky.com/astrophotos/sgr_sco_20250501_web_new_bsyeom.jpg염범석. Bum-Suk Yeom. ​ Taken by Bum-Suk Yeom ( https://www.cometsky.com ) on April 30, 2025 UTC @ Jangsu, South Korea. Details: 18:37 UTC, Sigma Art 40mm F1.. 2025. 5. 6.
Naked-Eye Giant Sunspot 맨눈으로 관측 가능한 큰 태양 흑점 Naked-Eye Giant Sunspot using Solar Glasses (or Solar Filter). 태양 안경을 사용하여 맨눈으로 관측 가능한 큰 태양 흑점. Large photo: https://cometsky.com/astronews/sun_20250503_sdo_bsyeom.jpghttps://cometsky.com/astronews/sun_20250503_sdo_en_bsyeom.jpg A giant sunspot, visible to the naked eye, is crossing the sun's disk. I could see the sunspot clearly with the solar glasses. This sunspot is eight times.. 2025. 5. 3.
Naked-Eye Giant Sunspot using Solar Glasses (or Solar Filter) 태양 안경을 사용하여 맨눈으로 관측 가능한 큰 태양 흑점 Naked-Eye Giant Sunspot using Solar Glasses (or Solar Filter). 태양 안경을 사용하여 맨눈으로 관측 가능한 큰 태양 흑점. Large photo: https://cometsky.com/astronews/sun_20250502_sdo_bsyeom.jpgA giant sunspot, visible to the naked eye, is crossing the sun's disk. This sunspot is six times the size of Earth. (Caution) You must use Solar glasses or Solar filters to protect your eyes. 육안으로 볼 수 있는 거대한 흑점이.. 2025. 5. 2.
Celestial objects to observe in May 2025 2025년 5월의 천체 관측 대상들 Celestial objects to observe in May 2025. 2025년 5월의 천체 관측 대상들. Large photo: https://cometsky.com/astronews/2025_05_may_skyobject_large_bsyeom.jpgBum-Suk Yeom. 염범석. 2025. 4. 30.
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.
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.

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