A wide star field is shown with several nebulae as identified by the rollover image. On the upper left is a large nebula named the Heart Nebula. Please see the explanation for more detailed information.
图中显示的是一片广阔的星场，其中有多个星云，如翻转图像所示。左上方是一个名为心脏星云的大星云。有关更多详细信息，请参阅说明。
See Explanation. Clicking on the picture will download the highest resolution version available.
请参阅说明。单击图片将下载可用的最高分辨率版本。
See Explanation. Clicking on the picture will download the highest resolution version available.
请参阅说明。单击图片将下载可用的最高分辨率版本。
See Explanation. Clicking on the picture will download the highest resolution version available.
请参阅说明。单击图片将下载可用的最高分辨率版本。
A starfield is shown with a large colorful emission nebula in the center. The outline of this emission nebula has a resemblance to a lion. Please see the explanation for more detailed information.
图中显示的是一片星空，中央是一个巨大的彩色发射星云。该发射星云的轮廓类似于狮子。有关更多详细信息，请参阅说明。
一颗蓝色的恒星位于一个红色星云的中心，周围是一个暗淡的蓝色星云。周围的星场本身有一个微弱的红棕色发射云。有关更多详细信息，请参阅说明。
星空中有一个大星云，大部分是红色，部分是蓝色，看起来像一只鸟的形状。有关更多详细信息，请参阅说明。
在一座岩石峰上方，可以看到黑暗星空中的红色星云。这个星云看起来像一只飞鸟。有关更多详细信息，请参阅说明。
2024年2月9日 When Roses Aren’t Red Image Credit & Copyright: Tommy Lease (Denver Astronomical Society) Explanation: Not all roses are red of course, but they can still be very pretty. Likewise, the beautiful Rosette Nebula and other star forming regions are often shown in astronomical images with a predominately red hue, in part because the dominant emission in the nebula is from hydrogen atoms. Hydrogen’s strongest optical emission line, known as H-alpha, is in the red region of the spectrum. But the beauty of an emission nebula need not be appreciated in red light alone. Other atoms in the nebula are also excited by energetic starlight and produce narrow emission lines as well. In this close-up view of the Rosette Nebula, narrowband images are mapped into…
2023年12月19日 NGC 1499: The California Nebula Image Credit & Copyright: Steven Powell Explanation: Could Queen Calafia‘s mythical island exist in space? Perhaps not, but by chance the outline of this molecular space cloud echoes the outline of the state of California, USA. Our Sun has its home within the Milky Way’s Orion Arm, only about 1,000 light-years from the California Nebula. Also known as NGC 1499, the classic emission nebula is around 100 light-years long. On the featured image, the most prominent glow of the California Nebula is the red light characteristic of hydrogen atoms recombining with long lost electrons, stripped away (ionized) by energetic starlight. The star most likely providing the energetic starlight that ionizes much of the nebular gas is the bright, hot,…
