For more-distant galaxies, astronomers rely on the exploding stars known as supernovae.
Like Cepheids, the rate at which a certain class of supernovae brighten and fade reveals their true brightness, which then can be used to calculate their distance..
Astronomy as a hobby
Astronomy can be a fascinating and rewarding pastime, whether you have a substantial telescope and accessories such as a CCD camera, or are a beginner observing with the naked eye..
As you can probably surmise, getting a degree in astrophysics is fundamentally more rigorous than getting a degree in astronomy, by virtue of the difficulty inherent in studying physics and mathematics..
Observing the Moon is one of the easiest ways to get started with astronomy.
You can track the lunar cycle, and use binoculars or a telescope to see how your view of it changes.
When the Moon is full, for example, it tends to be dazzlingly bright and one-dimensional..
stargazing (LOOKING AT STARS/PLANETS).
The average distance between two stars in the Milky Way is around 5 light-years, or 29 trillion miles (47 trillion kilometers), according to the National Radio Astronomy Observatory.
However, the human eye doesn't really see that average.
Our night-sky view is only a two-dimensional snapshot of the brightest stars..
Astronomers use "megaparsecs" — a megaparsec is 1 million parsecs — for intergalactic distances, or the scale of distances between the galaxies..
Founded in 1927, Amateur Astronomers Association, Inc. is a 100% volunteer-run 501(c)(3) non-profit that promotes the study and public awareness of the cosmos through observing, education, outreach, astrophotography, and more.
Every membership \& donation helps us to provide awe-inspiring programming for all to enjoy..
Astronomers use telescopes and cameras to observe the stars and other objects in the sky, and they often use complicated math to make predictions and solve puzzles about their movements and locations.
The Greek root, astronomia, literally means "star arrangement.".
The AAA Observatory at United Astronomy Clubs of New Jersey will be open to the public on the night closest to the Last Quarter Moon… CLASS CANCELLED.
A FREE
Single-evening class about developments in astronomy and a featured story.
Background presentation with Q&A and class discussion.
Tuesday
The Amateur Astronomers Association hosts observing sessions
Free and open to the public
At Great Kills Park located in Great Kills
NY.
Cancelled Join the Amateur Astronomers Association in Fort Greene
Brooklyn for free observing sessions
Open to the public! We will meet near the corner of
The Amateur Astronomers Association hosts observing sessions
Free and open to the public
At Great Kills Park located in Great Kills
NY.
Cancelled… The AAA returns to the High Line for 2023 with a new location! Join us on Tuesdays
Weather permitting.
The AAA Observatory at United Astronomy Clubs of New Jersey will be open to the public on the night closest to the Last Quarter Moon… CLASS CANCELLED.
A FREE
single-evening class about developments in astronomy and a featured story.
Background presentation with Q&A and class discussion.
Tuesday
The universe is a large place full of wondrous and unimaginable things.
The amateur astronomy hobby contains words
And technical terms that may seem be a little confusing for both beginners and the more experienced hobbyists.
The Amateur Astronomers Association hosts observing sessions
free and open to the public
at Great Kills Park located in Great Kills
NY.
Cancelled… The AAA returns to the High Line for 2023 with a new location! Join us on Tuesdays
