NGC 6572 是一个 行星状星云，视星等8.1，即使以业馀天文学家的小望远镜，它也是个足够明亮，可以轻松观测到的目标，因此很受业馀人士的注意。 它的位置在 蛇夫座，距离3,500光年， …

NGC 6572 is a planetary nebula in the constellation Ophiuchus. It was discovered in 1825 by the German astronomer Friedrich Georg Wilhelm von Struve. According to several sources such …

NGC 6572 is a pretty young planetary nebula, estimated only a few thousand years old. As a result the glowing gas is still quite concentrated, which explains why it is abnormally bright. It …

NGC 6572 is a Planetary Nebula in the Ophiuchus constellation. NGC 6572 is situated close to the celestial equator and, as such, it is at least partly visible from both hemispheres in certain …

One of the brightest planetary nebulae in the sky, NGC 6572's compactness and small size (averaging about 14 seconds of arc in diameter) precludes visual observation of the intricate …

NGC 6572 is a small but bright planetary nebula that is known for its intense blue-green color. Use high magnification for the best view. To its east are two bright open clusters, NGC 6633 …

2014年10月1日 · Estimates of relative line intensities available in the literature and integrated Hβ fluxes of the planetary nebula NGC 6572 during the time covered by optical observations …

2021年7月19日 · Our object for the 150th monthly edition of the Observer’s Challenge is the tiny, but bright, planetary nebula NGC 6572, variously nicknamed the Emerald Nebula, the Blue …

Aller and Liller (1957) discovered the variability of the spectrum of IC 4997 and Vorontsov-Velyaminov (1961) found variations in line intensities of NGC 6905. Khromov (1962) tried to …

NGH以制造高品质的汽油引擎而闻名, 更是中国第一家自主研发生产四冲程RC汽油引擎的工厂，GF38是由NGH工程师为模型爱好者打造的专业级四冲程汽油引擎，高性能低油耗、大扭力 …