Hi Phillip, and welcome to EPZ and also the Critique Gallery. We try to be helpful here, and work with you to improve your skill and knowledge, answer questions, and have fun.
This shot was taken some time ago, and you have very specific question.
You will need to get familiar with some sort of editing programme. Thats the key to being able to asses your image, and decide what can be done to improve it.
Even the camera itself, when you review a shot on the LCD, will have the ability to show you a "histogram" of the image, which tells you right away of the shot is exposed properly. It gives you the option to re-take a shot, though it would be difficult in this case.
You are using a preset mode (action), so the camera makes all the decisions. You also used SPOT metering, which in this case wasnt a good idea; better to use the default metering. When shooting into the sky, its always a good idea to increase exposure in camera, by using the Exposure Compensation feature, and set it to+2/3 or +1.
Are you still using camera presets, or have you explored the more creative modes the camera has?
The image is very underexposed. I used a histogram measurement in Photoshop to know that.
They are small, but thats the size they are at 260mm; when the image has exposure corrected, they become more visible, and cropping the image to a 16X9 format with a lot less sky works well.
If you scroll up and click the modifications tab, you will see two mods I uploaded; mod1 is the original crop, exposure corrected; mod2 is the 16X9 crop.
There will be some more critiques coming on this, - you will get lots of feedback.
Enjoy the site.