甘伯串珠

2023年1月3日

Kemble’s Cascade of Stars
Image Credit & Copyright: Tommy Lease

Explanation: This line of stars is real. A little too faint to see with the unaided eye, Kemble’s Cascade of stars inspires awe when seen with binoculars. Like the Big Dipper though, Kemble’s Cascade is an asterism, not a constellation. The asterism is visible in the northern sky toward the long-necked constellation of the Giraffe (Camelopardalis). This string of about 20 unrelated stars, each of similar brightness, spans over five times the angular width of the full moon. Stretching diagonally from the upper left to the lower right, Kemble’s Cascade was popularized last century by astronomy enthusiast Lucian Kemble. The bright object near the top left of the image is the relatively compact Jolly Roger open cluster of stars, officially designated as NGC 1502.

Tomorrow’s picture: big appetite

甘伯串珠
图像提供与版权: Tommy Lease

说明: 这串恒星是真的。这群名为甘伯串珠的恒星，过于昏暗而肉眼不得见，然而用双筒望远镜观看时，却是会让人惊叹的景观。就如同北斗七星，位在北天具有长颈的鹿豹座方向之甘伯串珠，是星官而非星座。这个大约由20颗无关联恒星组成的星串，每颗恒星都具有相近的亮度，整体的张角则超过5个满月的宽度。在这幅图像里由左上向右下绵延的此星串，是在上个世纪由天文爱好者甘伯（Lucian Kemble）所推广。影上左上角附近的明亮天体是相当紧凑的海盗旗疏散星团，其正式的编录号为NGC 1502。（Kemble’s Cascade甘伯串珠；Jolly Roger海盗旗）

明日的图片: big appetite