科学与环境

NASA's Hubble spies spiral's edge

来源: Phys.org - latest science and technology news stories · 发布于

NASA's Hubble spies spiral's edge
来源: Phys.org - latest science and technology news stories

This NASA Hubble Space Telescope image features the edge-on, intermediate spiral galaxy NGC 1827, located roughly 37 million light-years away in the constellation Columba, the Dove. Hubble captured the image as part of a survey looking at 260 satellite galaxies around 22 Milky Wa

This NASA Hubble Space Telescope image features the edge-on, intermediate spiral galaxy NGC 1827, located roughly 37 million light-years away in the constellation Columba, the Dove. Hubble captured the image as part of a survey looking at 260 satellite galaxies around 22 Milky Way–like host galaxies within a radius of about 32 million light-years from Earth. Hubble has already observed 111 of these satellite galaxies.

The remaining galaxies will take an additional 149 Hubble orbits, one orbit for each galaxy, to observe.

阅读原文来源
Spiny dogfish blood contains a hormone long thought absent in sharks
科学与环境

Spiny dogfish blood contains a hormone long thought absent in sharks

Cortisol is a hormone that helps humans and many other animals regulate their energy use and respond to changing conditions. For a long time, sharks and rays were believed to rely on a different steroid hormone for these functions, without producing cortisol themselves. Now, a ne

Phys.org - latest science and technology news stories ·