In most cases diameter of observer`s pupils does not affects to ability see dim stars in eyepiece FOV. Most dim stars can be seen in scope exit pupil closer to 1 -1.5 mm, so effective pupil diameter is much less observer`s pupil (6-7-8 mm) and the adaptation does not help. More ...
For farther stars, other methods involving luminosity are used. Globular Clusters and Spiral Nebulae Around the time that Kapteyn published his model of the Milky Way, his colleague Harlow Shapely noticed that a type of star cluster called a globular cluster had a unique distribution in the sky...
If you could look directly at these objects, you might see something closer to images from telescopes that rely on visual light, like theHubble Space Telescope, Pagan said. But even that comparison isn't quite right, since Hubble is much bigger and more sensitive than the human eye. Also, ...
STARS, OSCILLATIONSSTARS, POST-AGBSTARS, POST ASYMPTOTIC GIANT BRANCHResults of linear stability analyses are presented for Wolf-Rayet-type central stars of planetary nebulae. Such objects are found to be strongly unstable towards radial pulsations, even at high temperatures above 10^5^K. The ...
Another key factor is the so-called "metallicity" of a galaxy, which is a measure of the amount of elements other than hydrogen and helium inside a galaxy (astronomers call these "metals"). Bigger galaxies will have more gas, which enables them to form more stars. But more metals can ...
STARS: CARBONSTARS: EVOLUTIONISM: PLANETARY NEBULAESTARS: EMISSION-LINEThe characteristics of the spectra of weak emission line stars (WELS) are found to be very similar to that of [WC]-PG1159 and PG1159 objects. On the basis of the spectra we find 31 WELS central stars of planetary ...
There are a few PNs also, but they are high magnification objects. For DSOs you will need filters for Nebulae of both types. For all other objects, you will need a good set of EPs, or a few EPs and a good Barlow or 2. Finally, just forget seeing anything looking like an astrophoto...
During the first weeks, I always dreamed to do some nebulae, but I wasn't able successfully to get any reasonable result. Until September 2021, I added a filter to my setup and here it is,M52 What are my goals? Middle of November I targeted onCrescent Nebula | NGC6888 | C27by watchi...