The rotation curves of galaxies show that the stars in the outer regions of galaxies are moving faster than expected based on the visible mass of the galaxy. This suggests that there is a large amount of unseen mass, or dark matter, holding the galaxy together.

Weakly interacting massive particles (WIMPs) are hypothetical particles that are thought to be a possible candidate for dark matter. They are massive but interact very weakly with other particles, making them difficult to detect.

The cosmological constant is a constant energy density that permeates the universe. It is thought to be responsible for the observed acceleration of the universe's expansion.

Dark energy and dark matter are both thought to be responsible for the observed acceleration of the universe's expansion. However, their exact relationship is still unknown.

The fate of the universe is still unknown and depends on the values of the cosmological parameters, such as the cosmological constant and the density of dark matter and dark energy. However, observations suggest that the universe is likely to continue expanding forever.

Black holes are not a candidate for dark matter because they are too massive and would have been detected by now.

The Wilkinson Microwave Anisotropy Probe (WMAP) was a satellite mission that was launched in 2005 to study dark energy. It made detailed measurements of the cosmic microwave background radiation, which provided valuable information about the early universe and the properties of dark energy.

The Planck satellite was a satellite mission that was launched in 2009 to study dark energy. It made even more detailed measurements of the cosmic microwave background radiation than WMAP, providing even more valuable information about the early universe and the properties of dark energy.

The James Webb Space Telescope is a space telescope that is currently being built to study dark energy. It is expected to launch in 2022 and will be able to study the universe in infrared light, which will allow it to see through dust and gas and study the early universe in more detail than ever before.

LUX-ZEPLIN (LZ) is an experiment that is currently being conducted to study dark matter. It is located in the Sanford Underground Research Facility in South Dakota and is the largest and most sensitive dark matter detector ever built.

The Dark Energy Survey is an experiment that is currently being conducted to study dark energy. It is using a telescope at the Cerro Tololo Inter-American Observatory in Chile to survey the universe and measure the properties of dark energy.

BICEP2 is an experiment that is currently being conducted to study the cosmic microwave background radiation. It is located at the South Pole and is designed to measure the polarization of the cosmic microwave background radiation, which can provide information about the early universe and the properties of dark energy.

LUX is an experiment that is currently being conducted to study the properties of dark matter. It is located in the Sanford Underground Research Facility in South Dakota and is designed to detect dark matter particles by measuring the scintillation light produced when they interact with xenon atoms.

DESI is an experiment that is currently being conducted to study the properties of dark energy. It is located at the Kitt Peak National Observatory in Arizona and is designed to measure the redshift of galaxies and quasars to map the expansion of the universe and learn more about dark energy.

Planck is an experiment that is currently being conducted to study the properties of the cosmic microwave background radiation. It is a satellite mission that was launched in 2009 and is designed to measure the temperature and polarization of the cosmic microwave background radiation with unprecedented accuracy.