Theophilus crater

Well, good evening everyone!
We are in the middle of a snow storm. Which means no observing tonight. 😦
As I hunker down and stay out of the foul weather,
The Theophilus crater is a amazing structure that is estimated to have formed between 1-3 billion years ago.With prominent terraced walls.This crater measures 61 miles,and is approximately 14,000 ft deep. Contrasting it’s flat floor is a 4,000 ft tall central peak. The central peak is believed to have been formed by the bounce back of the bedrock during the initial impact. One of the best places to see the physics of large impacts is in slow-motion photographs of droplets splashing. Every major feature of impact is represented: formation of a transient crater, ejection of jets, and collapse of the transient crater. Following the collapse of the transient crater, the floor rebounds to produce a central jet.


Below is a image of a water droplet that I took about 3 years ago. Note the central peak,terraced walls as the water crater is first formed.

Water droplet

Image credit: Andrew


10 Responses to “Theophilus crater”

  1. Very cool site, debating on getting a telescope for the (cough) kids…ya that’s it…what are you using? or what would you suggest for a novice who wants to take photos with it as well?

  2. Thank you for the kind words!.
    I am using a 10″ Meade Schmidt Newtonian mounted on a Losmandy G11 . Images were acquired with a Neximage 5.
    To answer your question I must ask you. What do you want to take photo’s of?. Seems like a silly question I know but,it helps point you in the right direction.

  3. Ok, . I would suggest a Dobsonian telescope to start with. It will give you the best aperture for the buck. Most are what is considered a fast scope. Which means less exposure time,and are quite affordable. This will allow you images of the planets, and a few of the brighter DSO’s.

  4. You are welcome 🙂 Good luck!

  5. Andrew, just wanted to say I am really enjoying your blog. I have had a life long interest in astronomy. I still vividly recall my dad brought home a surveyor’s transit (basically a small telescope) one time back in the 1960’s. Looking through that thing at the moon amazed me and today it amazes me one can take photos such as yours from your own yard. Keep up the good work.

  6. Thank you for the kind words Charles!. I myself have looked at the moon through a transit. Well, mostly at the girls across the
    I have fond memories of dragging my father out of bed at 2am to look at Saturn in the 1970’s. Scopes have come a long way since my 2″ Jason refractor. A good share of the new scopes are quite affordable. This hobby is a money pit though 😉

  7. I have been tryin to photograph water droplet but things not working out. Your image looks nice. Can you shed some light on how you managed to have this shot and what camera you used n lens?

  8. I got the shot actually by timing the water drop as it started. I took a bunch of shots until I got the timing exact. The cam I used was a Pentax istDS dslr with the same lens as your Cannon. I believe it is a 18-50 mm.

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