When a rocket launches it leaves behind it a trail of exhaust. From the rocket itself there’s a V-shaped plume of exhaust that grows bigger and wider as the rocket ascends and the air pressure drops. This can sometimes be tough to see during daylight unless you’re close to the launch site. At night it’s much easier to see the rocket and V-shaped plume since the rocket is so bright, but you often can’t see the long plume behind it because there’s nothing illuminating it.
But there’s a sweet spot, for a little while after sunset (or before sunrise, but getting up that early? who needs that sort of negativity in their lives?!) when it’s dark enough overhead to see the rocket, but the Sun’s still shining over the horizon to illuminate the plume…
I didn’t figure it would matter at all. We again had several pop-up thunderstorms that weren’t in the forecast at all (what IS up with that?) and late this afternoon we were getting light showers and we weren’t watching anything in the sky except the bottoms of some thick, black clouds.
But I checked again just before the SpaceX launch, and it was surprisingly clear. I kicked the “LIVE!” button in Facebook.
It was AMAZING!!
The plume had gone from horizon to (almost) horizon (there’s a tree there to the southeast) and the lighting and timing were perfect.
In the video you can see the first stage come up from behind the mountains (0:56), shut down and separate from the upper stage (1:42), the second stage light (1:49), the first stage falling behind with occasional white flashes from the cold nitrogen gas thrusters it uses for maneurvering (2:37 & 2:39), and the two fairing halves separating and falling away (2:46). If you listen carefully (or are using headphones) you can hear neighbors from a couple of spots through the neighborhood hooting & hollering.
Even fifteen minutes after the launch, the plume was still illuminated as the upper level winds twisted and dissapated the exahust, still lit from the Sun far over the western horizon.
Online on social media you’ll see videos and pictures from all up and down the California coast, from Pismo Beach to San Diego, down into Baja, and inland in as far as Palm Springs, Phoenix, Tucson, and Las Vegas. There’s even one picture from a guy somewhere over the Rockies at 34,000 feet, hundreds and hundreds of miles away.
It was quite the show!
We Love The Stars Too Fondly 