🎂 Today is the 9th birthday of gravitational-wave astronomy

Happy anniversary to GW150914, our first detection!

Happy birthday to #GW170817 our first binary neutron star detection, and the first #GravitationalWave with electromagnetic counterparts!

The gamma-ray burst following the merger was spotted by the Fermi and Integral telescopes and later many other telescopes

https://www.ligo.org/science/Publication-GW170817BNS/index.php

#Astrodon

Welcome to the fourth observing run! #O4IsHere

O4 will last 20 months, with
Virgo and KAGRA joining us in the run. We expect the detection rate will be roughly twice in our past observing run

More news linked from https://ligo.org/news.php #ObservingRun4

Right *now*, LIGO Livingston is fully operational and observing, with a binary neutron star range of around 138 Mpc. Come on LIGO Hanford!

You may check the current detector status at https://online.ligo.org #GravitationalWaves

Hello LIGO Hanford! Both LIGO observatories are now locked and observing! #O4IsHere #Astrodon

We are excited to announce that our next observing run (O4) is scheduled to begin late May!

We will observe for 18 months!

Virgo, KAGRA and the two LIGO detectors will run together!

Expect many #GravitationalWaves!

Observing plan: https://observing.docs.ligo.org/plan/

#O4IsComing #Astrodon