[8][9] They provide new information about solar flares and active regions as well as clusters of galaxies and disconnection events in comet tails (see Research section below).

[12]  He is author of the book "The Scientific Method: Why science is a crucial process for human progress, not just another academic subject or belief"[13] After graduating from Northeast High School in Fort Lauderdale, Florida, in 1967, Holman obtained a Bachelor of Science degree in physics with a minor in mathematics at Florida State University in 1971.

[1]  His PhD dissertation, obtained under the supervision of Dr. Wayne A. Christiansen, was titled "Models for X-Ray and Radio Emission from Clusters of Galaxies".

[1]  With Kundu he coedited the Proceedings of the International Astronomical Union (IAU) Symposium No, 107, "Unstable Current Systems and Plasma Instabilities in Astrophysics".

[1] While at NASA Goddard, Holman supervised four PhD students[18][19][20][21] (through UNC Chapel Hill and The Catholic University of America) and mentored numerous Postdoctoral Fellows and summer interns.

[28]  Holman and collaborators showed how the population of non-thermal electrons responsible for the radio emission could also heat the plasma producing the X-rays, providing a connection between the two sources.

[32]  Holman and collaborators showed that the damping of short-wavelength Alfvén waves could keep the particles from being slowed to this speed, especially in the exceptionally hot plasma in the clusters of galaxies.

[34]  Holman and colleagues showed that maser emission from a distribution of high-energy electrons partially mirrored at the bottom of a magnetic loop could be responsible for these spikes.

[36] Eruptions of rapidly moving material from the Sun, coronal mass ejections, drive shock waves in the solar corona and beyond.

Holman has collaborated on observational studies examining the initiation of coronal mass ejections[39] and the properties of Type II emission.

[41]  (However, in 2015 Holman and collaborator Adi Foord[42] found that a significant X-ray flare occurred outside any active region,[43] in association with the eruption of a long, quiescent filament.)

Magnetic field strengths up to 600 Gauss were deduced, while the presence of cooler plasma and higher Alfvén speeds than expected in the corona were also inferred.

Brosius, Holman and collaborators[54] examined two disconnection events that occurred during this period of time along with the properties of the solar wind measured by ICE.

Holman was Co-Investigator and member of the science team for the Ramaty High Energy Solar Spectroscopic Imager (RHESSI).

[56]  Much of Holman's research focuses on analysis of the RHESSI X-ray data[4] to deduce the origin and evolution of energetic electrons produced in solar flares.