Uploaded August 2024 | Updated September 2026, 3 weeks ago
In 1998, astronomers made a groundbreaking discovery that the universe's expansion is accelerating. This finding contradicted the expectation based on Einstein’s general theory of relativity, which suggested that the expansion should slow down as the universe's contents become less dense.
The accelerated expansion can be explained by the presence of a small amount of energy associated with the vacuum of space, now known as dark energy. This energy does not dilute as space expands. Einstein Was Right AGAIN! Einstein had actually contemplated the possibility of such energy, introducing the concept of the cosmological constant (Λ) in his general relativity theory in 1915 to account for a fixed amount of extra energy infused into space to prevent the universe from collapsing due to matter dilution.
This concept is now at the center of the standard model of cosmology known as the "Lambda CDM model," illustrating the crucial role of the cosmological constant in modern understanding of the universe's expansion.
Video Editor: Aman Kaushal
Presentor: Sidhart Viyyapu
Project Head: Rajkumar Shukla
Production: World Of Science Media
In 1998, astronomers made a groundbreaking discovery that the universe's expansion is accelerating. This finding contradicted the expectation based on Einstein’s general theory of relativity, which suggested that the expansion should slow down as the universe's contents become less dense.
The accelerated expansion can be explained by the presence of a small amount of energy associated with the vacuum of space, now known as dark energy. This energy does not dilute as space expands. Einstein Was Right AGAIN! Einstein had actually contemplated the possibility of such energy, introducing the concept of the cosmological constant (Λ) in his general relativity theory in 1915 to account for a fixed amount of extra energy infused into space to prevent the universe from collapsing due to matter dilution.
This concept is now at the center of the standard model of cosmology known as the "Lambda CDM model," illustrating the crucial role of the cosmological constant in modern understanding of the universe's expansion.
Video Editor: Aman Kaushal
Presentor: Sidhart Viyyapu
Project Head: Rajkumar Shukla
Production: World Of Science Media
