拾光记 Lumina

Why we look up at the stars

The universe began about 13.8 billion years ago and has been cooling ever since. Some 380,000 years in, it grew cold enough for electrons to join atomic nuclei and for light to travel freely for the first time. That faint afterglow is what we still detect today as the cosmic microwave background. Then came long ages of darkness, until gas drew together under gravity, collapsed, and ignited: the first stars lit the void.

Inside stars, hydrogen and helium are forged into heavier elements. When those stars burn out as supernovae, or collide as neutron stars, that material is scattered back into space and gathered into the next generation of stars and planets. Round after round, the carbon, oxygen, and iron in your body all came from some star that died long ago. We are, quite literally, a span of cosmic time made flesh.

So when we look up, we are not seeing a distant elsewhere but our own origin. This wiki is built for that curiosity and that sense of belonging: from learning a single star and reading a star chart to capturing the faint light of the deep sky yourself. It is here to help you come to know the night sky, and the universe we are part of.

Astronomy

Celestial coordinates, time systems, magnitudes, the Solar System, stars, deep-sky objects, cosmology, and observing conditions.

Astrophotography

Optics, sensors, exposure, calibration frames, deep-sky and planetary capture, remote imaging, and post-processing workflows.

Knowledge index

Object Catalog A filterable index of Messier / NGC / IC targets: position, magnitude, hemisphere, season, and recommended focal length.

Observatories Research-grade observatories, major instruments, and site conditions.

Glossary Bilingual definitions of common astronomy and astrophotography terms.

Software Planning, capture, guiding, stacking, and post-processing tools.

Remote platforms Positioning, pricing, and use cases of AstroBin, iTelescope, SkyShare and others.

Learning paths Reading orders organized by goal, starting from an entry page.

Where to start

Observing from scratch → Learn how latitude and season decide what you can see (hemisphere visibility), then move on to celestial coordinates to locate targets.

Getting into deep-sky imaging → Start with remote imaging for how data is acquired, then move on to stacking for basic post-processing.

Image gallery

Images on this site come from public-domain or openly licensed sources such as NASA, ESO, ESA/Hubble, and Wikimedia Commons. Click anywhere below to open the guide to notable deep-sky objects and browse them all.

M42, the Orion Nebula, a bright emission nebula commonly seen in the northern winter sky. 图源 NASA, ESA, M. Robberto (Space Telescope Science Institute/ESA) and the Hubble Space… · Public domain

NGC 3372, the Carina Nebula, a large southern emission nebula and star-forming region. 图源 ESO · CC BY 4.0

Browse all notable deep-sky objects →