2025年7月3日
Nova V462 Lupi Now Visible
Image Credit & Copyright: Matipon Tangmatitham (NARIT)
Explanation: If you know where to look, you can see a thermonuclear explosion from a white dwarf star. Possibly two. Such explosions are known as novas and the detonations are currently faintly visible with the unaided eye in Earth’s southern hemisphere — but are more easily seen with binoculars. Pictured, Nova Lupi 2025 (V462 Lupi) was captured toward the southern constellation of the Wolf (Lupus) last week near the central plane of our Milky Way galaxy. Nova Lupi 2025 was originally discovered on June 12 and peaked in brightness about a week later. Similarly, Nova Velorum 2025, toward the southern constellation of the Ship Sails (Vela), was discovered on June 25 and peaked a few days later. A nova somewhere in our Galaxy becomes briefly visible to the unaided eye only every year or two, so it is quite unusual to have two novas visible simultaneously. Meanwhile, humanity awaits even a different nova: T Coronae Borealis, which should become visible in northern skies and is expected to become even brighter.
Tomorrow’s picture: open space
豺狼新星V462目前可见
影像提供与版权: Matipon Tangmatitham (NARIT)
说明: 如果你知道该往那里看，你可以见到来自一颗（甚至二颗）白矮星的热核爆炸。这种爆炸的分类为新星，而目前肉眼隐约可见、但透过双筒望远镜轻易可辨的热核爆炸，位于南半球。上图所示的豺狼新星2025（V462 Lupi），是在上星期摄于南天银河系中央盘面附近的豺狼座方向。豺狼新星2025（Nova Lupi 2025）首先发现于6月12日，并在大约一星期后达到最大亮度。类似的船帆新星2025（Nova Velorum 2025），6月25日发现于南天船帆座方向，然后亮度的峰值出现在数天之后。虽然银河系大约每一到二年，就会出现一颗肉眼短暂可见的新星，不过，同时出现二颗可见新星，也算是蛮稀罕的。在此同时，人们更在等待另一颗新星 – 北冕座T（T Coronae Borealis），这颗北天的新星预期会更明亮。
明日的图片: open space
