Jan Oort

The Dutch astronomer Jan Oort calculated that there must be an even vaster cloud of ice even farther out beyond the Kuiper Belt – between 5,000 and 100,000 astronomical units from the Sun. Just a reminder, 1 astronomical unit is the distance from the Earth to the Sun, so we're talking really really far away ...

You do realize that the Oort cloud is a hypothesis presented by Jan Oort. There is no conceivable way to prove its existence. Deborah Byrd • 4 months ago. Well, long-period comets do come to the inner solar system. They must come from somewhere. :-/ Deborah. yaridanjo • 4 months ago. Correct! Claudia ...

The Oort cloud itself cannot be observed directly, and its existence was only proposed in 1950 by the Dutch astronomer Jan Oort, to explain the existence of long-period comets. The researchers suggest that the long-period comets are larger than their inner-system counterparts because they spend less ...

Many science-savvy people take it for granted that the universe is made not only of Carl Sagan's oft-quoted "billions and billions" of galaxies, but also a vast amount of an invisible substance called dark matter. This odd matter is thought to be a new kind of subatomic particle that doesn't interact via ...

Jan Oort successfully proved and modified Lindblad's theory in 1927 after observing the velocities of many stars. During Oort's studies of star motions in 1932, he noticed that many stars move faster than expected, given their location within the Milky Way. He then used the term dark matter – not as we use it ...

Each time the solar system bobs up or down through the dark disk on the Milky Way carousel, they argued, the disk's gravitational effect might destabilize rocks and comets in the Oort cloud — a scrapyard on the outskirts of the solar system named for Jan Oort. These objects would go hurtling toward the ...

The layout of the solar system, including the Oort Cloud, on a logarithmic scale. Credit: NASA. For thousands of years, astronomers have watched comets travel close to Earth and light up the night sky. In time, these observations led to a number of paradoxes. For instance, where were these comets all ...

Astronomer Jan Oort (who theorized the existence of the Oort cloud and later had it named after him) had predicted in 1950 that distant comets might burn off their covering of ice and dust on their first trip around the sun. “I thought, 'Wow, maybe we are seeing these things that he predicted and nobody ever ...

Jan Oort made many contributions to astrophysical knowledge. But he is best known for his discovery of a vast swarm of comets surrounding the sun. The Oort Cloud, as it came to be called, was the source of the last week's much-ballyhooed sun-grazing Comet ISON. Oort's discovery was important for a lot ...

In 1950, Dutch astronomer Jan Oort suggested that some of the comets entering the solar system come from a cloud of icy bodies that may lie as far as 100,000 times Earth's distance from the sun, a distance of up to 9.3 trillion miles (15 trillion kilometers). Two types of comets travel through the solar system.

Het is een klein wonder. De houten kijkerbuis van de zesduimstelescoop in de Leidse Sterrewacht is sinds zijn ingebruikname in 1838 nog geen fractie kromgetrokken. Een minuscule afwijking en een dergelijk instrument kan naar het astronomische ...

The existence of the dark matter was first proposed by the Dutch astronomer Jan Oort (1900-1992) in 1932 to attempt to explain orbital velocities of stars inhabiting our large, barred-spiral Milky Way Galaxy.

Dark matter existed as a concept, first proposed by astronomers like Jan Oort in 1932 and Fritz Zwicky in 1933, who also noticed discrepancies in how much mass astronomers could see and how much physics implied should be present.

Dutch astronomer Jan Oort applied Newton's laws of motion and gravity to the observed matter in our own Milky Way and found that our galaxy rotated faster than he had calculated.

I don't really know that I have a good answer to that question, but one person I would like to meet would be [Dutch astronomer] Jan Oort. I would like to see how he thinks. He made a lot of different and important contributions to astronomy, and it's ...

I don't really know that I have a good answer to that question, but one person I would like to meet would be [Dutch astronomer] Jan Oort. I would like to see how he thinks. He made a lot of different and important contributions to astronomy, and it's ...

Most remain in the Oort cloud (Jan Oort 1900-1992 Dutch astronomer) far beyond Pluto but occasional cloud collisions cause them to ricochet out on erratic trajectories and this can lead to Earth strikes.

In 1932, a Dutch Astronomer named Jan Oort proposed that the concentrated disk that contains the dark matter may reveal the movement of the stars.

recensiespiegel. Hij is minder bekend dan Christiaan Huygens of Jan Oort, maar hij kan beschouwd worden als de grondlegger van de 20ste-eeuwse Nederlandse sterrenkunde: Jacobus Kapteyn (1851-1922). En dat terwijl hij het als hoogleraar astronomie ...

Source: ESO/M. Kornmesser Beyond the asteroid belt, beyond the reaches of Neptune, the Oort Cloud orbits, its myriad icy bodies floating in interstellar space.

A Dutch astronomer, Jan Oort, had in 1950 postulated the existence of what has come to be known as the Oort Cloud. Astronomers believe it is composed of billions of icy bodies - residual material from the formation of the solar system.

Along with those former Orioles, your birthday buddies for today include: King Edward IV of England (1442), President James Monroe (1758), astronomer Jan Oort (1900), Lamborghini creator Ferrucio Lamborghini (1916), To Kill A Mockingbird author Harper ...

It was in 1950 that Jan Oort suggested that a reservoir of comets lies on the outer limits of our solar system, and that the long-period comets are sometimes knocked from their very distant orbits (perhaps by passing stars) to orbits that bring them ...

Back in 1960, Jan Oort published his hypothesis of the Oort cloud, a theoretical shell of trillions of icy objects that lies light years away from the sun.

Vele Nederlandse astronomen zoals Jan Kapteijn en Jan Oort hebben aan de wieg gestaan bij het bepalen van de afstanden van onze Melkweg. Voor de kosmologische afstanden historie moeten we de astronomen zoeken in de V.S. Harlow Shapley en ...

In 1932, the Dutch astronomer Jan Oort tallied the stars in the Milky Way and found that they came up short. Judging by the way the stars bob up and down like horses on a carousel as they go around the plane of the galaxy, Oort calculated that there ...

In 1932, the Dutch astronomer Jan Oort tallied the stars in the Milky Way and found that they came up short. Judging by the way the stars bob up and down like horses on a carousel as they go around the plane of the galaxy, Oort calculated that there ...

The solar system is embedded in an enormous bee-swarm of comets, so evidently something must stir up this "Oort Cloud" (named for the Dutch astronomer Jan Oort) at regular intervals, sending a flurry of icy bodies sunward, some on a collision course ...

The solar system is embedded in an enormous bee-swarm of comets, so evidently something must stir up this "Oort Cloud" (named for the Dutch astronomer Jan Oort) at regular intervals, sending a flurry of icy bodies sunward, some on a collision course ...