2025年10月16日
NGC 7129的年轻太阳们
影像提供与版权: Timothy Martin
说明: 年轻的恒星仍然位于尘埃密布中的NGC 7129内，距离地球约3,000光年，位于皇家星座的仙王座方向。虽然这些恒星的年龄相对较小，仅有几百万年，但我们的太阳很可能在大约五十亿年前类似的恒星育婴室中形成。在清晰的影像中，值得注意的是反射年轻星光的美丽蓝色尘埃云。然而，紧凑而深红的新月形状也是高能年轻恒星天体的标志。这些被称为赫比格-哈罗天体的形状和颜色是由于氢气被喷流冲击后发光的特征。与蓝色云层混合的较淡延伸红色发射丝状物是由于尘埃颗粒通过光致发光将肉眼不可见的紫外线星光有效地转换为可见的红光所造成的。最终，该区域的原生气体和尘埃将被驱散，恒星将逐渐分散，随着松散的星团绕着银河系中心运行。在NGC 7129的估计距离下，这一望远镜视野的跨度接近40光年。
明日的图片: pixels in space
Due to the lapse in federal government funding, NASA is not updating APOD website. We sincerely regret this inconvenience.
由于美国联邦政府资金中断，NASA目前暂停更新APOD网站。对此带来的不便，我们深感抱歉。
英文原文:
Explanation: Young suns still lie within dusty NGC 7129 , some 3,000 light-years away toward the royal constellation Cepheus. While these stars are at a relatively tender age, only a few million years old, it is likely that our own Sun formed in a similar stellar nursery around five billion years ago. Notable in the sharp image are the lovely bluish dust clouds that reflect the youthful starlight. But the compact, deep red crescent shapes are also markers of energetic, young stellar objects. Known as Herbig-Haro objects, their shape and color is characteristic of glowing hydrogen gas shocked by jets streaming away from newborn stars. Paler, extended filaments of reddish emission mingling with the bluish clouds are caused by dust grains effectively converting the invisible ultraviolet starlight to visible red light through photoluminesence . Ultimately the natal gas and dust in the region will be dispersed, the stars drifting apart as the loose cluster orbits the center of the Galaxy. At the estimated distance of NGC 7129, this telescopic field of view spans nearly 40 light-years.
