[Arc]

Hello everyone. My family and I live in Central Queensland and about a week ago while we were stargazing and noticed a narrow beam of light that stretched across the whole sky from south to north. I tried to get a picture of it but failed so let me explain what we saw.

It was pretty high and the beam was straight, narrow, white in colour and stationary. My wife thought a plane was coming and it was a huge spot light on the nose of the plane. But no plane arrived. Then we really noticed how long it was. It looked like it may have been from horizon to horizon though we could not see the horizons from our backyard. It's hard to judge how high it was but let's say about normal cloud level height maybe 5000ft.

We left it for twenty minutes and when we checked again the beam was still there but had moved from overhead to about a kilometre to the east. It was at the same height and still stationary. That made me wonder if we were moving away from it via the rotation of the Earth.
Could we have been lucky enough to see a pulsar cutting through our atmosphere? Is that even possible?

Cheers