Any Astronomy Buffs Here?

duke79 said:
My wife and I got up at 3:00 AM (EST) to go out to our back yard to see the "peak" of the lunar eclipse. It was quite impressive but not exactly "blood red" as some people were claiming it would be - more like a light, rosy red and the moon did disappear for a short time in the shadow of the sun. Of course, I was somewhat concerned that we might be trampled by the hordes of deer that inhabit our yard at this time of year.
Click to expand...
I agree that the degree of red was overstated by some moon pundits.
 
Fun XKCD:
planet_definitions.png

Title Text: "Under the 'has cleared its orbital neighborhood' and 'fuses hydrogen into helium' definitions, thanks to human activities Earth technically no longer qualifies as a planet but DOES count as a star."

-jk
 
-jk said:
Tease! ("The images were taken by a camera on board the unmanned Blue Ghost spacecraft which successfully landed on the planet earlier this month.")

View attachment 19496

-jk
Click to expand...
A question for the astronomy nerds:

During a total eclipse of the sun as viewed from earth the moon covers the solar disk, but the corona is still visible.

The earth is bigger than the moon so what does totality look like from the moon during an eclipse such as just occurred? Is there still some corona visible? From the photo above it appears there is.
 
camion said:
A question for the astronomy nerds:

During a total eclipse of the sun as viewed from earth the moon covers the solar disk, but the corona is still visible.

The earth is bigger than the moon so what does totality look like from the moon during an eclipse such as just occurred? Is there still some corona visible? From the photo above it appears there is.
Click to expand...
You just answered your own question. ;)
 
DevilHorse said:
Remember 'Percy' (Mars Rover Perseverance) ?

It is still at work. They found an interesting rock in their travels:

MSN

www.msn.com

Larry
DevilHorse
Click to expand...
I'm looking at a see star s50 . I need a telescope that self tracks and is light wieght .
I have dizzy spells and regular telescopes are giving me some issue .
I'm in the looking process. I need it light wieght aswell to carry it to the beaches at night .
Thanks for the link .
 
Update on the Near Earth Object 2024 YR4 that was (still is) threatening the earth:

Good news, probability of hitting earth is way down.
Bad news, the moon might not be so lucky. But at 60 meters across, not likely to destroy any cities on the moon (or earth).

Larry
DevilHorse
 
DevilHorse said:
Update on the Near Earth Object 2024 YR4 that was (still is) threatening the earth:

Good news, probability of hitting earth is way down.
Bad news, the moon might not be so lucky. But at 60 meters across, not likely to destroy any cities on the moon (or earth).

Larry
DevilHorse
Click to expand...
I'd love to see it hit the moon, preferably on the Earth facing side.
 
-jk said:
That’s a tough angle!

-jk
Click to expand...
Just looking at the geometry of this, it is more likely to hit the away side of the moon rather than the earth facing side.
The reason I say this is that the best angle to hit the earth facing side would require the NEO to go through the earth first, or skim us. So assuming all of those (bullseye) angles are not to be considered, what's left is mostly the back (50%) or what's left of the side where the trajectory isn't near the earth.

JMHO.

Larry
DevilHorse
 
  • Like
Reactions: -jk
DevilHorse said:
Just looking at the geometry of this, it is more likely to hit the away side of the moon rather than the earth facing side.
The reason I say this is that the best angle to hit the earth facing side would require the NEO to go through the earth first, or skim us. So assuming all of those (bullseye) angles are not to be considered, what's left is mostly the back (50%) or what's left of the side where the trajectory isn't near the earth.

JMHO.

Larry
DevilHorse
Click to expand...
The thoughts I had leading to my post! I just didn’t want to type that much.

-jk
 
-jk said:
That’s a tough angle!

-jk
Click to expand...
Just looking at the geometry of this, it is more likely to hit the away side of the moon rather than the earth facing side.
The reason I say this is that the best angle to hit the earth facing side would require the NEO to go through the earth first, or skim us. So assuming all of those (bullseye) angles are not to be considered, what's left is mostly the back (50%) or what's left of the side where the trajectory isn't near the earth.

JMHO.

Larry
DevilHorse
DevilHorse said:
Just looking at the geometry of this, it is more likely to hit the away side of the moon rather than the earth facing side.
The reason I say this is that the best angle to hit the earth facing side would require the NEO to go through the earth first, or skim us. So assuming all of those (bullseye) angles are not to be considered, what's left is mostly the back (50%) or what's left of the side where the trajectory isn't near the earth.

JMHO.

Larry
DevilHorse
Click to expand...
Here's a thought. We have a number of space telescopes that can take pictures of the far side of the moon. The LRO space telescope orbits the poles of the moon. It has 3 cameras that can be used to take high resolution pictures, including one with a wide angle lens. The wide angle lens can take about 1 picture per second. But I think the fuel will run out before the NEO comes back.

The JWST is not a good candidate for taking pictures of this event because it is designed for long exposures (to see distant objects). But it is 1 million miles from the earth, exactly with a view of the far side of the moon (always at the L2 Lagrangian Point). The L2 Lagrangian Point is a perfect spot to place a camera to see a far side of the moon event.

I wouldn't be surprised if we come up with a camera strategy that could have a camera, like the LRO, in position at the right place and time to see the asteroid hit. Of course, it probably would have other mission objectives since there is only a few percent chance of the strike even happening.

Larry
DevilHorse
 
Easter Sunday is a good day to watch Ben Hur (Heston version). In it there is the scene when Judah encounters the 4 white stallions that will later take him to the Circus in Jerusalem (I think that track eventually closed). The Sheik named the 4 horses after the stars. Can you name those stars?

For all celebrating Easter and the End of Passover, I wish you well and happiness.

Larry
DevilHorse
 
DevilHorse said:
Easter Sunday is a good day to watch Ben Hur (Heston version). In it there is the scene when Judah encounters the 4 white stallions that will later take him to the Circus in Jerusalem (I think that track eventually closed). The Sheik named the 4 horses after the stars. Can you name those stars?
Click to expand...
Secretariat, Seattle Slew, Man o' War, and Affirmed?
 
You must log in or register to reply here.
Back
Top