In general relativity, an event horizon is the part of a black hole where light cannot escape. Imagine the black hole to be like a ball that you could see in a large spot of emptiness. The event horizon would then be an outer bubble that surrounds that ball, the space between the ball and the larger bubble would be the event horizon. If an object goes past the event horizon, it can never get away from it. Light that is emitted from inside of the event horizon near the black hole can never reach an observer on the other side. If an observer saw an object fall into a black hole, it would look like the object was stuck at the event horizon forever. The reason this happens is because of the gravity of the black hole slows down time around it, making it look like the object will take an infinite amount of time to reach it.
Nanosecond
A nanosecond (ns) is one billionth of a second. It is equal to 10 seconds.
One nanosecond is equal to 1000 picoseconds. 1000 nanoseconds is equal to one microsecond. Ten nanoseconds are sometimes called a shake.
Some things that take between one nanosecond and ten nanoseconds are listed below
Microsecond
A microsecond (sometimes shortened to μs) is one millionth of a second. This page lists times between 10 seconds (1 microsecond) and 10 seconds (10 microseconds).
One microsecond contains 1000 nanoseconds. There are 1000 microseconds in one millisecond.
Millisecond
A millisecond (sometimes shortened to 'ms') is one thousandth of a second. To help you understand how fast a milisecond is, try this video. This page lists times between 10 seconds and 10 seconds (1 milli<nowiki>second</nowiki> to 10 milliseconds).
One millisecond contains 1000 microseconds. There are 1000 milliseconds in a second.
Decasecond
A decasecond is a unit of time equal to 10 seconds. It can be written mathematically as 10 seconds.
Hectosecond
A hectosecond is equal to 100 seconds. It can be written as 10 seconds. There are 10 hectoseconds in a kilosecond, which is 1000 seconds. There are 10 decaseconds in one hectosecond.
Kilosecond
A kilosecond is 1000 seconds. It can be written as 10 seconds. It is equal to 16 minutes, 40 seconds. There are 86.4 kiloseconds in a day (24 hours).
Megasecond
A megasecond is one million seconds. This page lists times between 10 seconds and 10 seconds, which is about 11.6 days and 0.0317 years.
Ten megaseconds is equal to 115.74 days. 100 megaseconds is equal to 3.2 years.
Gigasecond
A gigasecond (symbol: Gs) is one billion seconds. That is about 31.7 years. It can be written as 10 seconds.
3.16 Gs is about 1 century (100 years). 31.6 Gs is about 1 millennium (1000 years).
This page lists times of between 1 and 1000 gigaseconds, or between 31.7 and 31,700 years.
Terasecond and longer
A terasecond (symbol: Ts) is one trillion seconds. That is about 31,700 years. It can be written as 10 seconds.
Here is a list of time spans longer than 1 terasecond:
Here are some examples of events that take this long:
Picosecond
A picosecond is an standard unit of measuring time. It is equal to 10 of a second. That is one trillionth, or one millionth of one millionth of a second, or 0.000000000001 seconds.
Femtosecond
A femtosecond is one billionth of one millionth, or one quadrillionth of a second. It can be written as 10 second. Even shorter than this is an attosecond.
Attosecond
An attosecond (as) is a very short period of time. It is equal to one quintillionth of a second (or 0.000000000000000001 seconds). It can also be written as 10 seconds. Because it can be hard to think about how short this period of time is, on this page is a list of descriptions of periods of time longer than 1 attosecond, but shorter than one femtosecond (which is 10 seconds). This should help when thinking about periods of time that have different orders of magnitude.
Orders of magnitude (time)
An order of magnitude describes the link between two amounts. The difference between each step is usually 10, with each order being either 10 times greater or 10 times smaller than the next amount. This makes the scale easy to manipulate using logarithms. For time, the difference between the smallest limit of time, the Planck time, and the next order of magnitude is larger than 10.
Lycée Thiers
The Lycée Thiers is a public secondary school in the city center of Marseille and obtains the best results of the academy of Aix-Marseille. It is considered one of the most demanding in France.
The law of May 1, 1802 decided the creation of 45 secondary schools in France. The "Lycée de Marseille" was opened on December 22, 1802. Under Napoleon III, it was called "Lycée Impérial". In 1930, it took the name of "Lycée Thiers."
The Lycée Thiers is constituted by a college of 400 pupils and a lycee of 1900 pupils, with 980 pupils studying in the "classes préparatoires aux grandes écoles" (classes to prepare students for entrance to the élite "grandes écoles")!
Mauritania national football team
Mauritania national football team is the national football team of Mauritania.
Mauritius national football team
Mauritius national football team is the national football team of Mauritius.
Morocco national football team
Morocco national football team is the national football team of Morocco.
Mozambique national football team
Mozambique national football team is the national football team of Mozambique.
Namibia national football team
Namibia national football team is the national football team of Namibia.
Niger national football team
Niger national football team is the national football team of Niger.
Nigeria national football team
Nigeria national football team is the national football team of Nigeria.
The following players were called up for the friendly matches against Algeria and Tunisia in Austria on 9 and 13 October 2020 respectively.
<br>"Caps and goals current as of 17 November 2019 after the match against Lesotho."
Réunion national football team
Réunion national football team is the national football team of Réunion.
Rwanda national football team
Rwanda national football team is the national football team of Rwanda.
São Tomé and Príncipe national football team
São Tomé and Príncipe national football team is the national football team of São Tomé and Príncipe.
Senegal national football team
Senegal national football team is the national football team of Senegal.
Seychelles national football team
Seychelles national football team is the national football team of Seychelles.
Sierra Leone national football team
Sierra Leone national football team is the national football team of Sierra Leone.
Somalia national football team
Somalia national football team is the national football team of Somalia. They have never qualified for the World Cup or the African Cup of Nations.
South Africa national football team
South Africa national football team is the national football team of South Africa.
Sudan national football team
Sudan national football team is the national football team of Sudan.
Eswatini national football team
Eswatini national football team is the national football team of Eswatini.
Tanzania national football team
Tanzania national football team is the national football team of Tanzania.
Togo national football team
Togo national football team is the national football team of Togo.
Tunisia national football team
Tunisia national football team is the national football team of Tunisia.
Uganda national football team
Uganda national football team is the national football team of Uganda.
Zambia national football team
Zambia national football team is the national football team of Zambia.
Zanzibar national football team
Zanzibar national football team is the national football team of Zanzibar.
Zimbabwe national football team
Zimbabwe national football team is the national football team of Zimbabwe.
Star Trek IV: The Voyage Home