A Wolf-Rayet star whose spectrum is dominated by emission lines of ionized carbon: C III 5696 Å, C III / C IV 4650 Å, C IV 5801-12 Å. This type is divided in sub-types WC4 to WC9.
A Wolf-Rayet star whose spectrum is dominated by emission lines of ionized carbon: C III 5696 Å, C III / C IV 4650 Å, C IV 5801-12 Å. This type is divided in sub-types WC4 to WC9.
A gravitational bending of light by structures in the Universe that distorts the images of distant galaxies. The distortion allows the distribution of dark matter and its evolution with time to be mea
sured, thereby probing the influence of dark energy on the growth of structures. Weak gravitational lensing is generally difficult to identify in individual images, in contrast to strong gravitational lensing.
A gravitational bending of light by structures in the Universe that distorts the images of distant galaxies. The distortion allows the distribution of dark matter and its evolution with time to be mea
sured, thereby probing the influence of dark energy on the growth of structures. Weak gravitational lensing is generally difficult to identify in individual images, in contrast to strong gravitational lensing.