Final answer:
X-rays from astronomical objects can indeed only be detected using telescopes in space because Earth's atmosphere blocks these wavelengths, necessitating space-based observatories like the Chandra X-ray Observatory for such high-energy astrophysical studies.
Step-by-step explanation:
The statement that X-rays from astronomical objects can only be detected using telescopes in space is indeed true. Earth's atmosphere is largely opaque to electromagnetic radiation at wavelengths shorter than visible light, which includes not only X-rays but also ultraviolet and gamma rays. This makes direct observations of these forms of radiation from the ground impractical, hence the need to place telescopes above the atmosphere to detect them. Moreover, being above the atmosphere offers an undistorted view of the universe, which is critical for high-resolution imaging of celestial objects, although cost and maintenance do pose significant challenges. The Chandra X-ray Observatory is an example of a space-based telescope designed specifically for observing high-energy phenomena such as exploding stars, quasars, and black holes using X-ray emissions.