by Ann » Thu Jun 30, 2022 5:50 am
RocketRon wrote: ↑Thu Jun 30, 2022 4:50 am
Interesting.
How do we know its on its "maiden voyage to the inner Solar System" ?
Good question, and you'll have to ask someone else, for example Chris.
For myself, I'll marvel at the three-dimensional nature of the Universe. (Yes, yes, I know it's four-dimensional. Bear with me.)
Bright Beta Ophiuchi is just some 80 light-years away, very comparable to the distance of the "five inner stars" of the Big Dipper. Beta Oph is a modest star as red giants go, radiating some 40 solar luminosities at visible wavelengths. It is comparable to Pollux.
IC 4665 is a nice cluster, some 1,000 light-years away. All its dominant members are B-type stars, so it is quite comparable to the Pleiades.
HS 161820 is a background star, some 2,000 light-years away. Its color, brightness and spectral class makes it quite comparable to Aldebaran.
Ann
[quote=RocketRon post_id=323844 time=1656564630]
Interesting.
How do we know its on its "maiden voyage to the inner Solar System" ?
[/quote]
Good question, and you'll have to ask someone else, for example Chris.
For myself, I'll marvel at the three-dimensional nature of the Universe. (Yes, yes, I know it's four-dimensional. Bear with me.)
[attachment=0]APOD 30 June 2022 annotated Comet and IC 4665.png[/attachment]
[clear][/clear]
Bright Beta Ophiuchi is just some 80 light-years away, very comparable to the distance of the "five inner stars" of the Big Dipper. Beta Oph is a modest star as red giants go, radiating some 40 solar luminosities at visible wavelengths. It is comparable to Pollux.
IC 4665 is a nice cluster, some 1,000 light-years away. All its dominant members are B-type stars, so it is quite comparable to the Pleiades.
HS 161820 is a background star, some 2,000 light-years away. Its color, brightness and spectral class makes it quite comparable to Aldebaran.
Ann