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INSPIRED BY THIS intriguing YouTube video, we’re going to dive into the tantalising question:
What would happen if the sun disappeared this very second?
The sun is about 333,000 times the mass of Earth and produces the same amount of energy as 100 billion hydrogen bombs every second.
Its giant mass makes the sun the dominant gravitational force in the solar system that locks all eight planets into elliptical orbits.
At the same time, the sun’s enormous energy heats our planet just enough so that Earth’s surface is the right temperature for liquid water — the catalyst for life.
But what would happen if we lost the sun?
What might seem like a silly question on the surface was actually an important thought experiment for Albert Einstein.
Before Einstein attacked this problem, scientists suspected — but hadn’t proved — that gravity acted instantaneously.
If that were true, then the first thing that would happen when the sun disappeared is that Earth, along with all the other planets, would go flying off into space. It would be complete and utter chaos in our solar system.
Light, on the other hand, is not instantaneous: It travels at approximately 1080 million kilometers per hour and takes roughly 8 minutes to reach Earth. Therefore, we would still see the sun in our sky eight minutes after it was gone.
So, if the speed of light is a constant and the speed of gravity is instantaneous, then we would feel the sun’s disappearance before we saw it.
But, as Einstein showed in in his theory of general relativity that he introduced in 1915, the force from gravity is not instantaneous. In fact, it travels the same speed as light.
Therefore, if the sun disappeared, we would remain blissfully unaware for eight minutes that inevitable doom was upon us.
We wouldn’t be left in complete and utter darkness, however.
The stars would still shine, and electricity would continue to work so cities would remain lit for as long as the power lasted. Even the planets would remain visible for a brief time.
For example, when Jupiter is closest to Earth it’s about 33 light minutes away, which means we would continue to see the giant planet for over an hour — the time it would take for residual sunlight to reach Jupiter and reflect back to Earth — after the sun was gone.
But after eight minutes, one thing on Earth would come to a screeching halt, explains Michael Stevens, who founded and stars in the widely popular YouTube channel Vsauce.
Without sunlight, photosynthesis — the process by which all plants generate food — would stop the second the sunlight winked out in our sky.
Most small plants would die within a matter of days, but that’s not what we should be worried about: Earth’s average surface temperature would drop to 0 degrees Celsius after the first week, and then to minus 100 degrees by the end of the first year, Stevens says.
All the while, Earth’s oceans would grow ever colder, eventually freezing over, transforming Earth into an ice world.
But just like deep lakes in winter, only the surface would freeze, leaving a liquid ocean underneath. If any humans survived this extreme transformation, their only refuge, according to Stevens, would be near geothermal vents on the ocean floor.
These vents emit heat that wells up from the center of the Earth.
Thousands of shrimp thrive around hydrothermal vents on the ocean floor.
This way of life would be miserably dark and lonely, and it is difficult to know whether humans would last long under these conditions.
On the other hand, the animals that live around these vents today would continue surviving for billions of years after the sun vanished. That’s because these animals don’t need the sun to live.
Instead, they get their food and energy from the heat coming out of these geothermal vents.
While most life would be extinguished from our planet without the sun, these geothermal-loving organisms would continue to thrive for billions of years without a single care that the sun no longer existed.
Oddly enough, this ice ball Earth resembles some of the moons around Jupiter that astrobiologist suspect could harbor extraterrestrial microbes.
This artist’s impression shows the planet orbiting the star Alpha Centauri B, a member of the triple star system that is the closest to Earth. Alpha Centauri B is the most brilliant object in the sky and the other dazzling object is Alpha Centauri A. Our own Sun is visible to the upper right.
Right now, Earth is orbiting the sun at a blazing speed of 107,000 kilometers per hour. If the sun vanished, its gravitational pull would be gone, but Earth’s speed would remain the same.
To understand why, picture yourself tying a rock to the end of a string and then swinging that string in a circle over your head. Then you let go of the string. The rock goes flying in a straight line away from you, the same way that Earth would go flying in a straight line away from the central point in space where the sun used to sit.
As long as Earth didn’t collide with any other planets, asteroids, or comets, it would only take about 377,000 hours (43,000 years) for it to traverse 4.3 light years — the distance to the nearest star, Alpha Centauri.
And after 1 billion years, Steven calculates, Earth would have traveled 100,000 light years, or the length of the entire Milky Way Galaxy.
Who’s to say our tiny planet wouldn’t get picked up and pulled into orbit by another star or, perhaps, a black hole? The Milky Way harbors an estimated 100 billion stars and as many as a billion black holes. Whatever the outcome, Earth’s future after no sun would be an exciting adventure across the cosmos.
Check out the two YouTube videos that inspired this post below:
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Setting up a transformation office? How many gardai have been allocated to this? Setting up a fancy shmancy office isn’t going to make a difference to the ordinary copper out there, who works 6 ten hour shifts back to back, who have no funding, have shoddy equipment, who deal with signing a hundred passport forms a day, telling someone their relative has just died, dealing with members of the public who all think the function of the gardai is to wave a magic wand and everything will be grand, confronting violent and sometimes armed individuals who have no regard for person or property and wouldn’t hesitate in killing a garda.. The list goes on. What’s needed is about 5,000 more gardai to deal with just the everyday things. Taking calls, responding to said calls, not to be telling the public “we’ve no car today because they’re in court, so we’ll get to your burgled house in about 5 hours “, proper allocation of time to investigate crimes. Oh and they also need a management that give a sh*t about them.
Amen to that MrsWoman.
Not the job it used to be, low pay = low interest in the job, no matter what industry.
Transformation office? When I read that I thought Kathryn Thomas was going to be weighing some fat coppers once a week while Karl Henry tried his best to give out to them.
Combatting the scourge of the breakfast roll.
A transformation office? Now that’s the best one I’ve heard yet
Hhmm . We will see about this ” reform” ? No confidence in the Governments ” security guards”.
Total waffle. G in Garda now stands for girlie.
Hillarious. Did you come up with that all by yourself?
Wonder will it make any difference to a force that has the tradition of what we have seen over the years? Not very hopeful
What tradition is that?….
And P in Peter now stands for Tool
Reserves badly managed, very unfair on all involved. Should be an asset but set up so badly it will not work, a pity many with good intentions but no guidance.
I wonder did they call it Operation Transformation
The transformation office is charged with……
Blocking reform, maintaining illegal gardai perks and practises, insuring that all investigations of garda wrong doing is suppressed. Naturally a lot of middle ranking gardai will be of the streets to staff the office. Ahhhh the smell of quango and corruption permeates the FG/LAB junta.
Is Mik The Pink now directing which way the Garda Siochana should be run
Thats soooo soooo reassuring.
A “transformation office” are we guna hav pre-op & post-op shicaloni now?
Mrswoman, could the 5,000 extra gardai needed be filled with garda reservists? Could they help out walk the beat, sign passports etc etc? Free up time
@Shelly. Are there even 5000 reserves? They don’t have full powers. They don’t work (as reserves) everyday… They don’t get paid. Not worth a damn.
Another sign of the Gardai being run by bean counters and desk jockeys of many varieties. Policing is not a business, you can’t run it like a business. Jobs for the boys in nice safe offices, people with useless management degrees telling actual police officers what to do. No regard for what is actually needed – more actual Gardai – not reserves – and not politically correct yes men & women. More shite “reform” from the “New” Commissioner – sure she’s a new broom blah blah blah
fas is now solas, what a difference.
I just think they (reservists) should be allowed to do the more mundane jobs and your time could be freed up to do proper policing. They could be rostered to get more involved on the days they work. That’s all
@Shelly, as far as I know the reserves accompany gardai to calls, help out in the station etc. But you might see a reserve once every three or four weeks…. They should concentrate on getting more Gardai out there, the force is crying out for not hundreds, but thousands.
Transformation me Asre!!! Are we really gonna see a transformation in gardai cancelling penalty points for themselves? their buddies and judges. Are we really gonna see a stop to murdering the spirits of well meaning and honourable whistleblowers? are we really gonna see a transformation in gardai being the private security thugs for government and Irish Water and Shell? Are we really gonna see a transformation in gardai fabricating evidence in pursuit of innocent or guilty parties? Are we really gonna see a transformation of their current ‘inability’ to pursue corrupt politicians, clergy, bankers and elite generally? Are we gonna see a transformation of the majority of PC plodders being silent about the behaviour of the minority of gardai? Not bloody likely….
fantastic by the government yet again. i can’t wait for FGs second term :)
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