Browse Definitions :
Definition

dark energy (quintessence)

Dark energy, also called quintessence, is a mysterious energy or force that has been postulated by astronomers and cosmologists to explain recent observations suggesting that the universe is expanding at an ever-increasing rate of speed. Dark energy affects the behavior of photon s (light particles) as they travel through space.

An exact definition of dark energy has eluded scientists. One description is that it is like gravity , but is repulsive (outward-pushing) rather than attractive (inward-pulling), and operates over a much larger scale than conventional gravity. The existence of dark energy is inferred from the apparent acceleration in the universe's expansion, and also from observed irregularities in the cosmic background radiation that many attribute to effects from a hypothesized Big Bang. The term Big Bang refers to the theory that a gigantic explosion took place approximately 12 billion (1.2 x 10 10 ) years ago, in which all the matter and energy in the known universe emanated from a single point or tiny primordial particle.

This was last updated in March 2011

Continue Reading About dark energy (quintessence)

Join the conversation

1 comment

Send me notifications when other members comment.

Please create a username to comment.

What is dark energy (quintessence)? - Definition from http://t.co/PQdxsKm2fr http://t.co/I9hKhHBB2w via @whatisdotcom ponder
Cancel

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • risk management

    Risk management is the process of identifying, assessing and controlling threats to an organization's capital and earnings.

  • compliance as a service (CaaS)

    Compliance as a Service (CaaS) is a cloud service service level agreement (SLA) that specified how a managed service provider (...

  • data protection impact assessment (DPIA)

    A data protection impact assessment (DPIA) is a process designed to help organizations determine how data processing systems, ...

SearchSecurity

  • NIST Cybersecurity Framework

    The NIST Cybersecurity Framework (NIST CSF) is a policy framework surrounding IT infrastructure security.

  • Port Scan

    A port scan is a series of messages sent by someone attempting to break into a computer to learn which computer network services ...

  • DMZ (networking)

    In computer networks, a DMZ (demilitarized zone), also sometimes known as a perimeter network or a screened subnetwork, is a ...

SearchHealthIT

SearchDisasterRecovery

  • business continuity plan (BCP)

    A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

  • disaster recovery team

    A disaster recovery team is a group of individuals focused on planning, implementing, maintaining, auditing and testing an ...

  • cloud insurance

    Cloud insurance is any type of financial or data protection obtained by a cloud service provider. 

SearchStorage

Close