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.


Last Updated: added graphics for the 88 constellations under Observation/The Night Sky.

Camelopardalis

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


Award-winning middle school online courses at Excel High School
Northgate Academy offers online homeschooling with a Christian worldview
Get Your Pharmacy technician certification online at Washington Online Learning Institute


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


Visit https://www.bestcustomwriting.com/write-my-research-paper and learn how to write my research paper professionally.


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


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.


Visit this page: https://www.advancedwriters.com/custom-research-paper.html and get Astronomy research project writing assistance for University classes.

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.


APOD:Iridescent by Moonlight
Image Credit & Copyright: Marcella Giulia Pace

Explanation: In this snapshot from November 18, the Full Moon was not far from Earth's shadow. In skies over Sicily the brightest lunar phase was eclipsed by passing clouds though. The full moonlight was dimmed and momentarily diffracted by small but similar sized water droplets near the edges of the high thin clouds. The resulting iridescence shines with colors like a lunar corona. On that night, the Full Moon was also seen close to the Pleiades star cluster appearing at the lower left of the iridescent cloud bank. The stars of the Seven Sisters were soon to share the sky with a darker, reddened lunar disk.


5 Reasons to Get a Degree in Astronomy
5 Best Online Courses in Astronomy


APOD:A High Cliff on Comet Churyumov-Gerasimenko
Image Credit & Licence: ESA, Rosetta spacecraft, NAVCAM; Additional Processing: Stuart Atkinson

Explanation: This high cliff occurs not on a planet, not on a moon, but on a comet. It was discovered to be part of the dark nucleus of Comet Churyumov-Gerasimenko (CG) by Rosetta, a robotic spacecraft launched by ESA that rendezvoused with the Sun-orbiting comet in 2014. The ragged cliff, as featured here, was imaged by Rosetta in 2014. Although towering about one kilometer high, the low surface gravity of Comet CG would likely make it an accessible climb -- and even a jump from the cliff survivable. At the foot of the cliff is relatively smooth terrain dotted with boulders as large as 20 meters across. Data from Rosetta indicates that the ice in Comet CG has a significantly different deuterium fraction -- and hence likely a different origin -- than the water in Earth's oceans. Rosetta ended its mission with a controlled impact onto Comet CG in 2016. Comet CG has just completed another close approach to Earth and remains visible through a small telescope.


APOD:Comet Leonard and the Whale Galaxy
Image Credit & Copyright: Gregg Ruppel

Explanation: Sweeping through northern predawn skies, on November 24 Comet Leonard (C/2021 A1) was caught between two galaxies in this composite telescopic image. Sporting a greenish coma the comet's dusty tail seems to harpoon the heart of NGC 4631 (top) also known as the Whale Galaxy. Of course NGC 4631 and NGC 4656 (bottom, aka the Hockey Stick) are background galaxies some 25 million light-years away. On that date the comet was about 6 light-minutes from our fair planet. Its closest approach to Earth (and even closer approach to Venus) still to come, Comet Leonard will grow brighter in December. Already a good object for binoculars and small telescopes, this comet will likely not return to the inner Solar System. Its perihelion, or closest approach to the Sun, will be on January 3, 2022.


AstronomyOnline.org is supported by individuals and businesses around the world. We are thankful for our benefactors who help keep the server costs covered, so we can continue to provide our valuable content to readers. Meier Orthopedic Surgeon in Los Angeles treats sports related injuries with cutting edge technology. Daily Fantasy Cafe provides new user bonus codes for daily fantasy sports. Michigan Lottery promo code provides bonus codes for folks playing the online MI lottery. Depth Charts offers the latest NFL, NBA and MLB depth chart information for teams.





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


Visit https://copycrafter.net/college-paper-writing-service.html to get help from professional essay writers.
Great and legit dissertation writing services listed here on LegitimateEssayWriting will be the right choice for your thesis.

Top Five Tips To Begin Stargazing As A Hobby

Rapidessay is a custom research paper writing service.
Legitimate essay writing services at Paytowriteessays.com.

Satellite Image: Find the Right Type of Satellite

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 (See Solar System App, Solar System Scope App) 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.

Back to Top

Advertisement

American Cancer Society | Mesothelioma Veterans Center | Cerebralpalsy Guidance | Recall Report | ConsumerSafetyGuide | Trident University | 5 STEM Space | KnowYourDNA

  

Search | Site Map | Appendix
©2004 - 2020 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.