What does older than the sun mean

The sun is a "new" star because it is fairly new compared to other stars that are billions of years older than our Sun. Log in. Idioms, Cliches, and Slang.

Study now. See Answer. Best Answer. Just judging from the words, it seems to refer to something that already existed before the sun formed. Study guides. Salary and Pay Rates 21 cards. How much money do fast food employees earn. What does hitch your wagon to a star mean.

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Grains are more heavily coated with the isotopes helium-3 and neon the longer they exist outside the solar system. Adding the age of the Sun, the presolar age of the grains, and the time it takes a star to reach the AGB stage, this dating suggests that the stars that made these grains were born about 7 billion years ago. Moreover, the team estimates that the stars that made these grains must have been between 2 and 3 times the mass of the Sun.

Some of the grains show signs that they traveled the galaxy in large clusters, which is consistent with observations of objects like the Egg Nebula , said coauthor Jennika Greer , a graduate student researcher at the Field Museum. One grain is more than 3 billion years older than the Sun, which, at more than 7 billion years, makes it the oldest solid material on Earth. Astronomers are still trying to figure out how often the Milky Way forms stars and whether the rate is constant or whether it fluctuates.

Previous studies , some based on theory and some on observations, have pointed to a period of slightly enhanced star formation about 7 billion years ago. This project analyzed 40 presolar grains from the meteorite. The researchers hope that future grains will have ages that let them look further back in time. Cartier, K. Published on 23 January Any reuse without express permission from the copyright owner is prohibited. Some water molecules contain deuterium, a heavy isotope of hydrogen that contains one proton and one neutron in its nucleus.

Isotopes are different versions of an element whose atoms have the same number of protons, but different numbers of neutrons. The most common hydrogen isotope, known as protium, for example, has one proton but no neutrons. Because they have different masses, deuterium and protium behave differently during chemical reactions.

Some environments are thus more conducive to the formation of "heavy" water — including super-cold places like interstellar space. The researchers constructed models that simulated reactions within a protoplanetary disk, in an effort to determine if processes during the early days of the solar system could have generated the concentrations of heavy water observed today in Earth's oceans, cometary material and meteorite samples.

The team reset deuterium levels to zero at the beginning of the simulations, then watched to see if enough deuterium-enriched ice could be produced within 1 million years — a standard lifetime for planet-forming disks. The answer was no.