AstronomyOnline.org
home observation science solar system stars our galaxy cosmology astrobiology exoplanets astrophotography

Welcome to Astronomy Online
A legally blind photographer/astronomer on disability so I use this site to contribute to society.

88 constellations under Observation/The Night Sky.

Pictor

This site is a testament that even though I have a physical disability - legally blind - I can still do things that helps other people.


This site stands as proof that, despite being legally blind, I can still contribute in meaningful ways.


I also have a new image gallery. I call it Second Site Image Gallery.


Understanding Distance: From Interstellar Travel to Cross-Country Moving


Check Grab My Essay which is one of the best essay writing services
Find on Top Writers Review your essay writing company
PickWriters provides the best translation services reviews
Find on LetsGradeIt best reviews on essay writing services


This is an educational website. It's never too late to learn astronomy, even for those who have not completed their primary (High School) education. A GED can get you in the door to college level courses.


How to Maximize Early Momentum on TikTok for Viral Reach

Affordable academic writing company CheapWritingHelp.com provides students with unique astronomy research papers and science essays.

A-Writer essay writing service with the best PhD writers on Astronomy.

Stargazing to Star Charts: Engaging Students in the Wonders of Astronomy

Space nerds, take the giant leap! Designing a celestial wedding for star struck lovers


APOD:Harvest Moon with Erupting Mount Etna
Dario Giannobile

Explanation: Have you ever seen the full moon rise? This colorful image was photographed last weekend in Sicily, just outside the town of Nicosia, in Italy. It is a composite photograph that shows the Moon rising as the sky turns darker. Lower clouds are reflecting the colors of antitwilight, while ash and gas from Mount Etna are seen higher in the background. The pink band lower in the sky is called the Belt of Venus. During a full moon, the Moon and the Sun are in opposition in the sky: the moon rises as the sun sets. The lunar phase cycle lasts approximately 29.5 days (but the Moon takes approximately 27 days to orbit the Earth). In some cultures of the Northern Hemisphere, the September full moon is called the Harvest Moon. Does your culture have a special name for it? (A full moon by any other name would shine as bright.)


A Student's Guide on How to Tackle Complex Astronomy Assignments

Navigating the Final Frontier: Understanding Space Law in the Age of Commercial Space Flight

Why Planning Your Day Fails - and What Actually Helps You Stay Consistent

How Not to Let Astrology Affect Your Life

APOD:The Ghosts of Five Supernovas

Stephane Vetter, Yann Sainty

Explanation: The ghosts of five supernovas haunt this extraordinary image. It was acquired at Oukaïmeden Observatory in Morocco with approximately 200 hours of observations and shows a large patch of the sky, equivalent to the area of one thousand full moons tiled together, in the constellation of Auriga (the Charioteer). From left to right, the five supernova remnants visible across the field are G181.1+9.5, G182.4+4.3, G179.0+2.6, G180.0−1.7 (Sh2-240, the Spaghetti Nebula), and G178.2−4.2. They are highlighted in the annotated image, together with open cluster M37 and the Tadpole Nebula. As each explosion expanded into space, it created a growing shell of shocked gas and delicate filamentary structures shown in red (hydrogen) and blue (oxygen), respectively. These ancient stellar explosions happened independently; they are at various distances up to about several thousands of light-years away from Earth and have estimated ages up to tens of thousands of years old. Early humans may have seen them as bright new stars, fading over weeks or months.


Astronomy in the Classroom: Engaging Students In Interesting Lessons

Is It Fate In The Sky, Or Merely A Mirror Of What We So Desperately Want To Believe?


APOD:A New Lunar Crater: McGetchin
NASA/GSFC/Intuitive Machines

Explanation: A once-in-a-lifetime crater has appeared on the Moon! A comet or asteroid roughly the size of a humpback whale (approximately 10-20 meters, 30-60 feet) crashed into the Moon sometime between April and May of 2024. The Lunar Reconnaissance Orbiter (LRO), with its monthly monitoring of the Moon, captured today's images of the lunar surface before and after the event. The resulting crater, named after Apollo-era lunar scientist McGetchin, is two soccer fields across. Craters of this size are only expected once every 132 years! Follow up thermal imaging revealed a large cold spot that surrounds the warm crater. Surface impacts will puff up the loose lunar sediment, or regolith, making it less dense and harder to retain heat. This event affected an area much larger than the visible crater, which will inform humanity's understanding of surface impacts and the evolution of the Moon's surface. It also reminds us all to be thankful for Earth's atmosphere.






Iris Nebula
- Image by Ricky Leon Murphy.

Astronomy Online is a personal resource of mine that is made public. Please enjoy the site.

ARCHIVED BLOG ENTRIES



How the Website is Organized:

Advertising within text will be in italics with a link to the ad source.

Observation - This section includes information on coordinate systems, constellations, objects visible in the night sky, and some images of the night sky of the northern and southern hemispheres.

Science - This section includes information on some of the basic science used in astronomy. There is information on the variety of tools used (like telescopes) as well as methods of using them. There is a mathematics primer, introduction to some physical processes, formulas used in astronomy, and information on computer use in Astronomy.

Solar System - As indicated, this section covers our Solar System and everything in it. It covers the Sun, planets, their moons, asteroids, comets and exotic objects like TNO's and Kuiper Belt Objects.

Stars - This section covers stars in our own galaxy. It covers the variety of stellar evolution paths. It also covers supernova, black holes, and some of the radiative processes in the interstellar medium.

Our Galaxy - This section covers our galaxy as well as some of the nearby galaxies in our own Local Group. It also covers galaxy evolution.

Cosmology - This section covers other galaxies and galaxies clusters. It also covers the big bang, relativity and dark matter.

Astrobiology - This section covers the relatively new field in astronomy - the possibility of life in our Solar System and the Universe. There is also information on some of the projects dealing with this - like SETI.

Exoplanets - This section covers the study of planets known to exist around other stars. It covers both amateur and professional involvement and shows you how you can get involved with the search as well.

Astrophotography - This section covers the fastest growing hobby of astrophotography. This section offers information and tips on photography and also features and Image Gallery.

  

Search | Site Map | Appendix
©2004 - 2026 Astronomy Online. All rights reserved. Contact Us. Legal. Creative Commons License
The works within is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.