Science and Technology

Source : https://www.facebook.com/pages/Dark-Matter/113077625507306?ref=ts&fref=ts
A star is born when atoms of light elements are squeezed under enough pressure for their nuclei to undergo fusion. All stars are the result of a balance of forces: the force of gravity compresses atoms in interstellar gas until the fusion reactions begin...

Source: pending
Images obtained with the Chandra X-ray Observatory have uncovered part of the secrets of the Crab Nebula by revealing a bright small ring around its center. Scientists had long searched for the missing link between the central pulsar and the nebula and...

Was it a noble gas?
Noble gases is a diversified elements 8A, called the noble gases on the analogy with the "noble metals", such as gold, which is associated with wealth and nobility, and has a low reactivity. They often also called inert gases, or a rare gas. But the...

Physique
Propriétés physiques et chimiques
A 4°C, là où la densité de l'eau est maximale, la densité de l'eau diminue avec l'augmentation de température, comme pour les autres substance qui se dilatent avec l'augmentation de température. Passé 4 °C, la densité diminue à mesure que la température...