2025年8月28日
Galaxies, Stars, and Dust
Image Credit & Copyright: Robert Eder
Explanation: This well-composed telescopic field of view covers over a Full Moon on the sky toward the high-flying constellation Pegasus. Of course the brighter stars show diffraction spikes, the commonly seen effect of internal supports in reflecting telescopes, and lie well within our own Milky Way galaxy. The faint but pervasive clouds of interstellar dust ride above the galactic plane and dimly reflect the Milky Way’s starlight. Known as galactic cirrus or integrated flux nebulae they are associated with the Milky Way’s molecular clouds. In fact, the diffuse cloud cataloged as MBM 54, less than a thousand light-years distant, fills the scene. The galaxy seemingly tangled in the dusty cloud is the striking spiral galaxy NGC 7497. It’s some 60 million light-years away, though. Seen almost edge-on near the center of the field, NGC 7497’s own spiral arms and dust lanes echo the colors of stars and dust in our own Milky Way.
Tomorrow’s picture: a dark veil
星系、恒星与尘埃
影像提供与版权: Robert Eder
说明: 这幅精心构图的望远镜视野覆盖了天空中飞马座方向超过一个满月的区域。当然，较亮的恒星显示出绕射光芒，这是反射望远镜内部支架的常见效果，并且位于我们自己的银河系之内。微弱但普遍存在的星际尘埃云漂浮在银河盘面之上，微弱地反射银河系的星光。这些被称为银河薄云或积分通量星云的尘埃云与银河系的分子云有关。事实上，编号MBM 54的弥漫云，距离不到一千光年，充满了整个视野。看似缠绕在尘埃云中的星系是引人注目的螺旋星系NGC 7497。但它距离我们约六千万光年。从视野中心附近几乎侧向看去，NGC 7497自身的螺旋臂和尘埃带与我们银河系中的恒星和尘埃的颜色相呼应。
明日的图片: a dark veil
