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Mack has described dark matter as "one of science's most pressing enigmas". [26] [27] She has worked on dark matter self-annihilation [28] and whether the accretion of dark matter could result in the growth of primordial black holes (PBHs). [29] She has worked on the impact of PBHs on the cosmic microwave background. [30]
MACS J0025.4-1222 is a galaxy cluster created by the collision of two galaxy clusters, and is part of the MAssive Cluster Survey (MACS). Like the earlier discovered Bullet Cluster, this cluster shows a clear separation between the centroid of the intergalactic gas (of majority of the normal, or baryonic, mass) and the colliding clusters.
Freese has contributed to early research on dark matter and dark energy. She was one of the first to propose ways to discover dark matter. [ 7 ] Her idea of indirect detection in the Earth is being pursued by the IceCube Neutrino Observatory experiment, [ 8 ] and the "wind" of dark matter particles felt as the Earth orbits the Milky Way (work ...
In the ongoing science quest to observe dark matter, there’s a new method in town. Researchers from Cornell University said in a new preprint paper (not yet peer reviewed or published) that dark ...
c. 16th century BCE – Mesopotamian cosmology has a flat, circular Earth enclosed in a cosmic ocean. [1]c. 15th–11th century BCE – The Rigveda of Hinduism has some cosmological hymns, particularly in the late book 10, notably the Nasadiya Sukta which describes the origin of the universe, originating from the monistic Hiranyagarbha or "Golden Egg".
The primary dark matter candidate in the range are axions, or axion-like particles. From about 1 eV to the Planck Mass, dark matter is projected to be fermionic or particle-like. Favorites in this range include WIMPS, thermal relics, and sterile neutrinos. Finally, in the mass range between the Planck Mass to masses on the order of the Solar ...
1964 - First black hole, Cygnus X-1, discovered; 1964 – CP violation discovered by James Cronin and Val Fitch. 1965 – Arno Penzias and Robert Wilson: Cosmic Microwave Background (CMB) discovered; 1967 – Unification of weak interaction and electromagnetism (electroweak theory) 1967 – Solar neutrino problem found
[1] [2] At the same time, a census of baryons in the recent observable universe has found that observed baryonic matter accounts for less than half of that amount. [3] [4] This discrepancy is commonly known as the missing baryon problem. The missing baryon problem is different from the dark matter problem, which is non-baryonic in nature. [5]