Recent content by Boxturtle

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    Graduate Finding Angles of Triangle Given Two Points on Earth and One in Space

    "Various websites will tell you how to convert DEC/RA to a vector." This is the first reply with a reference to the question I asked. Thank you.
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    Graduate Finding Angles of Triangle Given Two Points on Earth and One in Space

    Would the helicopter appear to be directly in front of the same star as seen from my yard?
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    Graduate Finding Angles of Triangle Given Two Points on Earth and One in Space

    Neither the law of sines nor the law of cosines can be used unless at least one angle (or all three sides) is known. How to determine that angle is my question.
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    Graduate Finding Angles of Triangle Given Two Points on Earth and One in Space

    I'm not sure how to interpret this, but let me attempt to clarify. I have two points on Earth. I know exactly where they are. I know the direction from one to the other, and I know the distance between them. I also have a third point in space. I do not know the location, but I do know the...
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    Graduate Finding Angles of Triangle Given Two Points on Earth and One in Space

    Hello Folks, I have two points on Earth at each end of a great circle path, for which I know the length in km and direction in degrees True. Also I have the RA and DEC of an object in space as seen from one of the previous points. The RA and DEC come from the setting circles of a telescope...