RR Lyrae
RR Lyrae is a variable star in the Lyra constellation, located near the border with the neighboring constellation of Cygnus. As the brightest star in its class, it became the eponym for the RR Lyrae variable class of stars and it has been extensively studied by astronomers. RR Lyrae variables serve as important standard candles that are used to measure astronomical distances. The period of pulsation of an RR Lyrae variable depends on its mass, luminosity and temperature, while the difference between the measured luminosity and the actual luminosity allows its distance to be determined via the inverse square law. Hence, understanding the period-luminosity relation for a set of local RR Lyrae-type variable stars allows the distance of more distant stars of this type to be determined.
The variable nature of RR Lyrae was discovered by the Scottish astronomer Williamina Fleming at Harvard Observatory in 1901.
The distance of RR Lyrae remained uncertain until 2002 when the Hubble Space Telescope's Fine Guidance Sensor was used to determine the distance of RR Lyrae within a 5% margin of error, yielding a value of 854 light-years (262 parsecs). When combined with measurements from the Hipparcos satellite and other sources, the result is a distance estimate of 860 ly (260 pc).
Podcasts:
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by R24
Kill Me In My Sleep
by: R24I’ve kept this all locked up inside,
No longer can reside.
I’m sick of you, never return
Listen, I won’t be unheard.
You’re not trustworthy
Always lying to me.
I cannot trust you.
Or ANYONE.
I’ve waited this long, to tell you, I HOPE YOU BURN!
Can’t take this anymore. I want you buried deep.
Can’t take this anymore, if this goes on, if this goes on, if this goes on, just kill me in my sleep.
You can’t tell me the truth.
Don’t know you anymore.
Gotten out of hand
This was so unplanned.
Secrets Kept.
No friends left.
Go away.
Sit and decay. X2
I know you’ve been lying.
Not even trying. Not even trying.
I know you’ve been lying.
I can’t help you, I will not help you.
I wanted to tell you I HOPE YOU BURN!
Can’t take this anymore, I want you buried deep.
Can’t take this anymore. If this goes on, If this goes on, If this goes on, if this goes on, kill me in my sleep. X3
You’re on your own.
You’re all alone.
No one can trust you.
No one will help you.
I wanted to tell you I hope you burn,
Cant Take this anymore I want you buried deep.
I’ve kept this all locked up inside,
No longer can reside.
I’m sick of you, never return
Listen, I won’t be unheard.
You’re not trustworthy
Always lying to me.
I cannot trust you.
Or ANYONE.
I’ve waited this long, to tell you, I HOPE YOU BURN!
Can’t take this anymore. I want you buried deep.
Can’t take this anymore, if this goes on, if this goes on, if this goes on, just kill me in my sleep.
You can’t tell me the truth.
Don’t know you anymore.
Gotten out of hand
This was so unplanned.
Secrets Kept.
No friends left.
Go away.
Sit and decay. X2
I know you’ve been lying.
Not even trying. Not even trying.
I know you’ve been lying.
I can’t help you, I will not help you.
I wanted to tell you I HOPE YOU BURN!
Can’t take this anymore, I want you buried deep.
Can’t take this anymore. If this goes on, If this goes on, If this goes on, if this goes on, kill me in my sleep. X3
You’re on your own.
You’re all alone.
No one can trust you.
No one will help you.
I wanted to tell you I hope you burn,
Cant Take this anymore I want you buried deep.