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Would keeping up with astronomy current events be a decent way to predict DSOs? I've only done this event last year and this year so I've had roughly the same set twice.

I guess I'll go (even though I got half the questions wrong :/ ) There is a main sequence star with with a temperature of 10,000K. 1. What are its spectral and luminosity classes? 2. What is the peak wavelength it emits at in nm? 3. What is the specific intensity/spectral radiance of the peak wavel...

I guess I'll go (even though I got half the questions wrong :/ ) There is a main sequence star with with a temperature of 10,000K. 1. What are its spectral and luminosity classes? 2. What is the peak wavelength it emits at in nm? 3. What is the specific intensity/spectral radiance of the peak wavele...

A distant star has a temperature of 12,303K , a radius of 2.3R_\odot , a mass of 2.94R_\odot and has a redshift of 0.00747 1) How far is this star in kilometers? Assume H_0=70\frac{km/s}{Mpc} . 2) If this star has a proper motion of 0.0423 milliarcseconds per year, what is its true space velocity i...

If something here breaks, it's probably because this was a saved draft message and IDK what I'm doing when it comes to drafts. Guess it's my turn to give a question There's a link to an image of a galaxy spectra with the x axis in angstroms: What type of galaxy is it (spiral, irr, elliptical, etc.)...

Guess it's my turn to give a question There's a link to an image of a galaxy spectra with the x axis in angstroms: What type of galaxy is it (spiral, irr, elliptical, etc.)? What is a general trend of the spectra that can be used to identify it? What are 3 or more specific lines that can be used to ...

I guess I'll take it...? The attached image will be needed to answer the following questions. What DSO is depicted in this image? When this cluster was first discovered, astronomers were unsure if it was a true galaxy cluster, or one just forming. Observations in what wavelength proved this to be a...

I figured out how I messed up | 1) I kind of ignored the 2nd pair of jets... I mean I noticed they were there but I guess I assumed they weren't important? 2) I didn't know that the analyses looked at all the regions that were open. I suppose I should have realized that when I started getting dupli...

Starting off from last marathon: A. What's the density of a schwarzschild black hole with a mass of 6.0E31 kg? (in kg/m^3) B. Would this black hole be more or less dense than a more massive one? C. What's the black hole's temperature D. What would the wavelength of the emitted blackbody radiation b...

Yup! That's correct! Last one was just a gut check I always just found it interesting with how much you can do with such little information with black holes. Also for the density one, since the volume is based off the mass too, you can just derive a "density equation" if you want to skip f...