Talk:HD 179821

A few problems here
It is estimated the star has been losing ~4 × 10-4 M⊙ yr-1 for about 1800 years and in last ~104 the star has lost ~10% of its initial mass

In "last ~104" what? Months? Years? And why ~104, not 1000?

HD 179821 has a cold detached dust shell which is very approximately circular in shape and has an inner diameter of ~3".3, corresponding to 3.0 × 1017 cm

"~3".3"? What does this mean?  And why is the next figure given in centimetres, not metres or kilometres?

While most authors consider HD 179821, others think is actually a protoplanetary nebula

The first phrase of this makes no sense as written. — Preceding unsigned comment added by 66.232.252.133 (talk) 12:17, 3 January 2013 (UTC)

"since its discovery"
The phrase "since its discovery" always provokes the question "When was that?" --Wetman (talk) 17:47, 3 January 2013 (UTC)