• Starting today August 7th, 2024, in order to post in the Married Couples, Courting Couples, or Singles forums, you will not be allowed to post if you have your Marital status designated as private. Announcements will be made in the respective forums as well but please note that if yours is currently listed as Private, you will need to submit a ticket in the Support Area to have yours changed.

Ask a physicist anything.

Status
Not open for further replies.

Gracchus

Senior Veteran
Dec 21, 2002
7,199
821
California
Visit site
✟38,182.00
Faith
Pantheist
Marital Status
Single
Politics
US-Others
So something could eclipse the Sun for a bit, with no devastating effects upon the earth?

You have to ask? It's happened

And how come stars can only be seen at night?

They can be seen at night if you look in the radio spectrum. The daytime sky is brighter than the stars in the visible spectrum, so the stars get lost in the "noise" like a cricket at heavy metal rock concert.

And why does city light affect this?

Same reason.

 
Upvote 0

pgp_protector

Noted strange person
Dec 17, 2003
51,891
17,792
57
Earth For Now
Visit site
✟458,688.00
Gender
Male
Faith
Christian
Marital Status
Widowed
Politics
US-Others
You're fired!!

jokes we luv u rly

So something could eclipse the Sun for a bit, with no devastating effects upon the earth?​

And how come stars can only be seen at night? And why does city light affect this?​

The Moon doesn't seem to have any devastating effects when it eclipses the sun every time, same for every inner planet that also eclipses (not full eclipses due to size).

Stars can't be seen during the day due to the brightness of the sky, I.E. the starlight's power is drowned out by the background light (same with city lights aka light pollution)
 
Upvote 0

TheReasoner

Atheist. Former Christian.
Mar 14, 2005
10,294
684
Norway
✟37,162.00
Country
Norway
Gender
Male
Faith
Atheist
Marital Status
Married

And how big the eclipse is going to be. You can eclipse the sun (albeit very locally) with a dinner plate. or a dime. This is how coronagraphs work. A small disk blocks out the sun, yet leaves the corona exposed. A false eclipse if you will. Determining the right size for such a disc is rather simple. You just need the diameter of the sun, and the distance to it. You can then calculate the needed diameter needed to cause an eclipse of sorts at any given distance from the sun.

Now, if you're wanting something that will cause an eclipse so large it blots out the sun on the entire globe you'll have to have something positively huge. If that happened I'm rather sure either this planet would be a goner due to gravitational pull I'd expect we'd be pulled out of our orbit at the very least. (though I haven't done any calculations on that) OR the solar system as a whole could go into complete chaos. But I doubt we'll be visited by a rogue object large enough to make either scenario a possibility.
 
Upvote 0

pgp_protector

Noted strange person
Dec 17, 2003
51,891
17,792
57
Earth For Now
Visit site
✟458,688.00
Gender
Male
Faith
Christian
Marital Status
Widowed
Politics
US-Others
I'd like to ask you highly-educated scientists for an explanation of how the Sun went dark for 3 hours during Jesus' crucifixion, but I'm afraid you'd answer with the scientist's way of saying, "I don't know" --- (giving the asker the 3rd degree).
Was it a Global or Local event?
 
Upvote 0

Wiccan_Child

Contributor
Mar 21, 2005
19,419
673
Bristol, UK
✟46,731.00
Faith
Atheist
Marital Status
In Relationship
Politics
UK-Liberal-Democrats
You're fired!!

jokes we luv u rly


<3

So something could eclipse the Sun for a bit, with no devastating effects upon the earth?
It could. But then again, it could be very devastating indeed.

And how come stars can only be seen at night? And why does city light affect this?​
Because sunlight and city light effectively illuminate the atmosphere. Starlight is quite dim, so if the atmosphere is aglow, you're not lightly to notice the stars through all the other light.

It's like trying to see the bulb through a torch beam.
 
Upvote 0

AV1611VET

SCIENCE CAN TAKE A HIKE
Site Supporter
Jun 18, 2006
3,855,997
52,622
Guam
✟5,143,330.00
Country
United States
Gender
Male
Faith
Baptist
Marital Status
Married
Politics
US-Republican
Upvote 0

kangitanka

Regular Member
Jul 2, 2006
281
16
✟23,009.00
Faith
Seeker
Marital Status
Married
And it was about the sixth hour, and there was a darkness over all the earth until the ninth hour..

Well, at least this passage is backed up by the Gospel of Matthew.
Additionally, the "stopping" not only of the moon's orbit around our planet but additionally the "stopping" of our planet's rotation would definitely cause the earth to quake and the rock to rend, along with the massive damage to the temple.
Not that I think that this happened, but at least Luke and Matthew got their stories straight (a difficult thing to do with the various books of the Bible IMNSHO).

 
Upvote 0

Wiccan_Child

Contributor
Mar 21, 2005
19,419
673
Bristol, UK
✟46,731.00
Faith
Atheist
Marital Status
In Relationship
Politics
UK-Liberal-Democrats

Though if God can stop a planet in its tracks, I'm sure he could do something about the inertia too.

My apologies.
I got into a COMPLETELY off topic deviation yet again on this thread.

My bad
Sounds physicsy to me!
 
Upvote 0

Jazmyn

Newbie
Oct 10, 2009
257
15
✟22,959.00
Faith
Calvinist
Marital Status
Single
It's in three of the books,
"From the sixth hour until the ninth hour darkness came over all the land." (Matthew 27:45)

"At the sixth hour darkness came over the whole land until the ninth hour." (Mark 15:33)

"It was now about the sixth hour, and darkness came over the whole land until the ninth hour," (Luke 23:44)

Also,

Thallus (52 A.D) quoted by Julius Africanus
"Upon the whole world there came a most fearful darkness. Many rocks were split in two by an earthquake, and many places in Judea and other districts were thrown down. It seems very unreasonable to me that Thallus, in the third book of his histories, would try to explain away this darkness as an eclipse of the sun. For the Jews celebrate their Passover on the 14th day according to the moon, and the death of our Saviour falls on the day before the Passover. But an eclipse of the sun can only take place when the moon comes under the sun, how then could an eclipse have occurred when the moon is directly opposite the sun?"

Phlegon, quote from his Olympiads mentioned by Julius Africanus
"Phlegon records that, in the time of Tiberius Caesar, at full moon, there was a full eclipse of the sun from the sixth hour to the ninth . . . It is evident that he did not know of any such events in previous years."

Phlegon cited by Origen in Against Celsus Book 2
"The darkening of the sun took place at the time of Tiberius Caesar, in whose reign Jesus was crucified, and the great earthquakes which then took place, Phlegon, I believe, has written an account in the thirteenth or fourteenth book of his Chronicles."

Tertullian wrote "In the same hour, too, the light of day was withdrawn, when the sun at the very time was in his meridian blaze. Those who were not aware that this had been predicted about Christ, no doubt thought it an eclipse. You yourselves have the account of the world-portent still in your archives."

Phlegon of Tralles cited by Eusebius of Caesarea (264 &#8211; 340), in his Chronicle, that during the fourth year of the 202nd Olympiad (AD 32/33)
"a great eclipse of the sun occurred at the sixth hour that excelled every other before it, turning the day into such darkness of night that the stars could be seen in heaven, and the earth moved in Bithynia, toppling many buildings in the city of Nicaea".

Paulus Orosius (A.D. 375 &#8211; 418), wrote circa A.D. 417 that Jesus
"voluntarily gave himself over to the Passion but through the impiety of the Jews, was apprehended and nailed to the cross, as a very great earthquake took place throughout the world, rocks upon mountains were split, and a great many parts of the largest cities fell by this extraordinary violence. On the same day also, at the sixth hour of the day, the Sun was entirely obscured and a loathsome night suddenly overshadowed the land, as it was said, &#8216;an impious age feared eternal night.&#8217; Moreover, it was quite clear that neither the Moon nor the clouds stood in the way of the light of the Sun, so that it is reported that on that day the Moon, being fourteen days old, with the entire region of the heavens thrown in between, was farthest from the sight of the Sun, and the stars throughout the entire sky shone, then in the hours of the day or rather in that terrible night. To this, not only the authority of the Holy Gospels attest, but even some books of the Greeks."

Crucifixion darkness and eclipse - Wikipedia, the free encyclopedia

I was wondering if an unknown planet passing between the Earth and the Sun could do that?
 
Upvote 0

Wiccan_Child

Contributor
Mar 21, 2005
19,419
673
Bristol, UK
✟46,731.00
Faith
Atheist
Marital Status
In Relationship
Politics
UK-Liberal-Democrats
I reckon it was just a normal eclipse. Either that, or a literary embellishment.
 
Upvote 0

Wiccan_Child

Contributor
Mar 21, 2005
19,419
673
Bristol, UK
✟46,731.00
Faith
Atheist
Marital Status
In Relationship
Politics
UK-Liberal-Democrats
Okay mr. physicist... Do you know of any bands like Opeth, yet less 'metal-ish'? Since physicists know everything (physics can - after all - explain everything) I expect you do.
My solution to the Schwarzschild metric implies that Rammstein meets your parameters - more rock, less metal, equal awesomeisity.
 
Upvote 0

AV1611VET

SCIENCE CAN TAKE A HIKE
Site Supporter
Jun 18, 2006
3,855,997
52,622
Guam
✟5,143,330.00
Country
United States
Gender
Male
Faith
Baptist
Marital Status
Married
Politics
US-Republican
I reckon it was just a normal eclipse. Either that, or a literary embellishment.
Without looking it up, I believe the longest solar eclipse on record is 7:52.

8 minutes is a long way from 3 hours.
 
Upvote 0

AV1611VET

SCIENCE CAN TAKE A HIKE
Site Supporter
Jun 18, 2006
3,855,997
52,622
Guam
✟5,143,330.00
Country
United States
Gender
Male
Faith
Baptist
Marital Status
Married
Politics
US-Republican
Then it was probably a embellishment.
That's quite an embellishment.

You don't put retroactive falsification on paper and get away with it.

Three different [human] authors wrote the same thing.

That's more than coincidental.
 
Upvote 0
Status
Not open for further replies.